EP3496846A2 - Agitator device and method - Google Patents

Abstract

The invention relates to an agitator device (10a; 10b; 10c; 10d; 10e) having at least one carrier unit (12a; 12b; 12c; 12d; 12e) that comprises at least one connection element (14a; 14b; 14c; 14d; 14e) for connecting to a driveshaft (16a; 16c) and at least one strut element (18a; 18b; 18c; 18d; 18e) for securing at least one agitator blade (20a, 20b; 20c; 20d). According to the invention, said strut element (18a; 18b; 18c; 18d; 18e) and connection element (14a; 14b; 14c; 14d; 14e) are connected to one another as a single piece.

Description

 Stirring device and method

State of the art

The invention relates to a stirring device according to the preamble of

Claim 1.

Stirrers are known from the prior art with a hub and with welded to the hub support beams, to each of which a stirring blade is attached known. The hub is attached to a drive shaft of a stirrer. Furthermore, agitators are known in which stirring blades are welded directly to a hub.

The object of the invention is in particular to provide a generic stirring device with improved properties in terms of a construction. The object is achieved by the features of claims 1, 2 and 15, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.

Advantages of the invention

The invention is based on a stirring device with at least one

Carrier unit, which has at least one connecting element for the particular releasable connection to a drive shaft and at least one spar member for fixing at least one stirring blade.

It is proposed that the spar element and the connection element are integrally connected to one another. Alternatively or advantageously additionally, it is proposed that the spar element has at least one section with an at least substantially quadrangular, advantageously at least substantially rectangular cross section.

The inventive design, an advantageous construction can be achieved. Furthermore, a low-cost and / or easy-to-produce stirring device can be provided. Furthermore, a stirring device can be provided, which can be cut from a sheet, wherein in particular a number of necessary welding operations can be reduced and / or a strength can be increased. In particular, a hub and spars of a stirring device can be manufactured from a common workpiece, wherein the stirring device is advantageously seamless. In addition, a high degree of flexibility with regard to a connection of a stirring blade can be achieved.

In particular, a stirring blade in a simple manner on a support beam

be connected. Advantageously, at least almost completely dispensed with a milling processing in a production. Furthermore, a spar with an advantageous geometry, in particular with regard to a simple production and / or a flexible and / or simple connection of a

Stirring be provided.

Under a "stirring device" is in particular a, in particular

functional, component, in particular a construction and / or

Functional component, a stirrer, for example, a mixer and / or an agitator, in particular for a fluid, in particular with a maximum speed of 500 rpm, advantageously of 200 rpm, particularly advantageously of 100 rpm, preferably of 50 rpm understood. In particular, the

Stirrer also include the entire mixer. Advantageous is the

Stirring a component of a stirring or formed as a stirring member. Particularly advantageously, the stirring device is provided to be rotated about an axis of rotation, in particular during stirring.

Preferably, the stirring device is point-symmetrical, in particular with respect to a center point of the connection element. Especially preferred extends in a mounted state of the stirring device, the axis of rotation of the stirring device through the center of the connecting element. Advantageously, in an assembled state, the axis of rotation runs parallel to a

Vertical direction, in particular in a normal operating state of the stirring device, wherein the vertical direction is preferably perpendicular to a substrate.

Preferably, the carrier unit is integrally formed. Particularly preferably, the carrier unit is formed at least to a large extent and in particular completely from a metal, for example from steel and / or stainless steel and / or an alloy and / or any other metal such as aluminum and / or titanium. But it is also conceivable that the stirring unit is made at least for the most part of a plastic. Furthermore, it is conceivable that the stirring unit has an, in particular additional, at least partial coating, for example with a metal oxide and / or a, in particular corrosion-resistant, polymer, and / or rubberized. At least 55%, advantageously at least 65%, preferably at least 75%, particularly preferably at least 85% and particularly advantageously at least 95% are to be understood by the term "at least to a large extent." The connecting element or all connection elements of the carrier unit and the spar member or all spar elements of the carrier unit from the carrier unit.

Advantageously, the attachment element forms a part, in particular an upper part, of a hub. The connection element is particularly advantageously at least to a large extent, in particular completely, of a metal, for example of steel and / or of stainless steel, and / or of the same material as the one

Carrier unit formed. It is conceivable for the carrier unit to have a plurality of connecting elements, advantageously arranged one above the other, in particular with corresponding cross-sections, which together form the hub. Advantageously, the rail element is formed at least to a large extent, in particular completely from a metal, for example from steel and / or from stainless steel, and / or from the same material as the carrier unit. In particular, the spar element is elongated. Preferably, the spar member is straight. Particularly advantageously, the bar element is rod-like

educated. In particular, the spar element, in particular a longitudinal direction of the Holmelements, extending from a center of the

Connecting element in particular straight in a radial direction of the

Stirrer. Preferably, the spar element extends in a plane, in particular in a plane perpendicular to the axis of rotation. In particular, the spar member has a longitudinal extent which corresponds to at least 5%, advantageously at least 10%, particularly advantageously at least 20% and preferably at least 30% of a maximum extent, in particular a diameter, of the stirring device. It is also conceivable that the spar element is formed bent, wherein the spar member within the plane and / or from the

Level curved out can be formed. Advantageously, the spar member at least one connection region for the stirring blade, wherein the

Connection region is particularly advantageous for welding and / or screwing and / or a riveting and / or a one-piece connection and / or another connection is provided with the stirring blade. Preferably, the spar member forms a spar, to which a stirring blade attachable

or is connected. In particular, the spar corresponds to the

Holm element. It is also conceivable that the carrier unit has a plurality of advantageous stacked rail elements, in particular with corresponding cross sections, which together form a spar. In this case, the carrier unit can have a plurality of bars which

In particular, each of a plurality of, preferably stacked rail elements are formed. By "provided" is intended to be understood in particular to be specially designed and / or equipped, in particular that an object is intended for a specific function be understood that the object fulfills and / or executes this specific function in at least one application and / or operating state.

The term "one-piece" should be understood to mean, in particular, a piece, preferably a piece of a single workpiece and / or a single blank and / or a mass and / or a casting, or in an injection molding method, in particular an input and / or or

Multi-component injection molding process, produced. For example, it is conceivable for the carrier unit to be designed as a single forged part. It is also conceivable that the carrier unit is designed as a cast part. An "at least substantially square / rectangular cross-section" of an object should be understood to mean that at least 60%, advantageously at least 70%, particularly advantageously at least 80% and preferably at least 90% of all cross-sections of the object along at least one Direction a surface area of a differential area of the cross section and a smallest surrounding the cross section, advantageously non-covered quadrilateral / rectangle maximum 30%, advantageously at most 20%, more preferably at most 10%, preferably at most 5% and most preferably at most 3% of the area of the quadrilateral / Rectangles is.

Preferably, the section is formed cuboid. Particularly preferably, the section comprises at least a major part of the Holmelements and

in particular the entire spar element. In this case, "rectangular" should in principle also include geometric shapes that correspond to rectangles with rounded and / or beveled corners.Particularly advantageously, the spar element is of cuboid design, with rounded and / or chamfered edges in particular being also conceivable Rounding or a corresponding bevel can be reduced in particular a notch effect.

The spar member may also have a cross-section that of a

Rectangle is different. In particular, the cross section may be one of a Rectangle be different quadrilateral, such as a parallelogram with different internal angles of 90 ° or a trapezoid or any, advantageously not-covered square.

In an advantageous embodiment of the invention, it is proposed that the spar element and the connection element in a common

 Connection region in particular in a view perpendicular to the

Have rotational axis, at least substantially identical material thickness. In particular, in the connection region, a material thickness of the Holmelements corresponds to a material thickness of the connection element. Advantageously, the rail element and the connecting element in the connecting region along the axis of rotation at least substantially identical

Extension to. Advantageously, the connection element goes seamlessly into the

Holmelement over. Particularly advantageously, the connecting element, in particular in a view perpendicular to the axis of rotation, an at least substantially constant material thickness. The material thickness of the attachment element preferably corresponds to a material thickness of the portion of the tie-down element which has an at least substantially quadrangular cross-section. By "at least substantially" should be understood in this context, in particular, that a deviation from a

given value in particular less than 15%, preferably less than 10% and particularly preferably less than 5% of the predetermined value. As a result, an easy to produce geometry can be provided. Furthermore, a high load capacity, in particular a connection between a hub and a spar, can thereby be achieved. In a particularly advantageous embodiment of the invention, it is proposed that the connection element and the spar member are made of a common plate-like workpiece, in particular a sheet or plate, advantageously a metal sheet or a metal plate. The plate-like workpiece has in particular the same material as the carrier unit and may, for example, at least partially, in particular completely, from be formed of a plastic or a composite material. Advantageously, the entire carrier unit is made of the plate-like workpiece. Particularly advantageously, the spar member and the connecting element, advantageously the entire carrier unit or at least one corresponding blank are formed as a common flat part, for example as a Schnittflachteil or as a stamped flat part. As a result, a cost-effective manufacturability can advantageously be achieved. Furthermore, this can be a high flexibility in terms

usable manufacturing process and / or usable materials can be achieved. In a further embodiment of the invention it is proposed that the connecting element forms at least one connecting flange, which is provided for the particular releasable connection to a shaft flange, in particular a shaft flange of the drive shaft. It is advantageous

Connecting flange intended to be screwed to a shaft flange. Advantageously, the attachment element has a particular

cylindrical recess, which advantageously surrounds the connection flange. Particularly advantageous runs in an assembled state, the

Rotation axis through the recess. This can be advantageous

Properties with respect to a mountability and / or a simple maintenance and / or a possibility of a flexible conversion can be achieved.

It is conceivable that a connection between the connecting element and the drive shaft at least one force screw and / or at least one

Keyway includes. It is also conceivable that the connection element is provided to at least one clamping connection with the

Drive shaft to be connected. Alternatively or additionally, it is conceivable that the connection element is glued to the drive shaft. Further are

Of course, further, a person skilled in appearing suitable

Connection variants conceivable. In a preferred embodiment of the invention, it is proposed that the spar element has a tapered cross-section in at least one direction. In particular, the cross section of the Holmelements tapers in an advantageous radially extending direction away from the connection element.

Advantageously, the rail element has at least one first section with a constant, in particular at least substantially rectangular cross-section, which is particularly advantageously adjacent to the connection element. Particularly advantageously, the spar element has at least one second section with a, in particular at least substantially rectangular, tapering cross section. It is conceivable that the first section and the second section adjoin one another. Preferably, the spar member has at least a third portion with a particular at least substantially rectangular constant cross section, which is smaller than a cross section of the first

Section. It is conceivable that the second section and the third section adjoin one another. This can advantageously be adapted to a geometry of a load. In particular, this can be a flexible to a

appropriate requirement customizable geometry can be provided.

It is also proposed that the spar element is formed twisted at least in sections, for example at an angle of at least 5 ° or at least 10 ° or at least 15 ° or at least 20 ° or at least 30 ° or at least 45 ° or at least 60 ° or at least 75 ° or at a larger angle. In particular, that is

Holmelement twisted at least partially in itself. Advantageously, the spar member at least a first portion, with respect to the

Tying element is aligned straight. Particularly advantageously, the spar member at least a second portion, with respect to the

Tied connection element is arranged. Preferably, the second, tilted portion is provided for attachment of the stirring blade, so that this is advantageously aligned with a stirring with respect to a stirring direction employed. Particularly preferred is a the spar element opposite arranged further beam element of the carrier unit in an opposite direction, in particular twisted by the same angle. Preferably, the spar is cut out / punched out of the plate-like

Workpiece and a subsequent twisting produced formed. As a result, an angle of attack of a stirring blade can advantageously be adapted in a simple and / or cost-effective and / or variable manner.

Furthermore, it is proposed that the stirring device comprises at least one stirring blade, which is connected to the rail element. Particularly preferably, the carrier unit comprises at least one, in particular the spar member

opposite arranged, second beam element. Advantageously, the stirring device comprises at least one further stirring blade attached to the second beam element. Preferably, the stirring device per strut element at least one, advantageously exactly one attached to the corresponding spar member stirring blade. Particularly preferably, the carrier unit comprises exactly two bar elements and the stirring device has exactly two stirring blades, which are advantageously fastened to one of the bar elements. It is conceivable that the stirring device has a plurality of carrier units arranged in particular one above the other. A stirring device with a total of N stirring blades can advantageously comprise a number of N / 2 carrier units each having two stirring blades, which are particularly advantageously arranged at equal angles to one another, for example at angles of 720 ° / N, the stirring blades in particular in this case in a view parallel to the axis of rotation on a circle, preferably arranged at regular intervals. In particular, in the case of a stack of a plurality of carrier units, lower carrier units are designed such that they are fastened and / or attachable in a middle region, in particular in a region of their respective attachment element, to a respectively arranged carrier unit and / or to the drive shaft. However, it is also conceivable that the carrier unit comprises three or four or five or six or more beam elements and advantageously a corresponding number of stirring blades. This can be an easy to produce geometry to be provided. Furthermore, properties relating to stirring can thereby be adapted to a requirement.

In an advantageous embodiment of the invention it is proposed that the stirring blade is connected along a longitudinal side of the Holmelements with this. In particular, the stirring blade along its front longitudinal side with the

Connected spar member. The stirring element can be attached to the spar element

welded and / or screwed and / or glued and / or connected in another way with this. Preferably, the stirring blade has at least one in particular L-shaped outer contour, in the region of which it is connected to the rail element. It is particularly conceivable that the

Outer contour is L-shaped, with legs of the imaginary "L" enclosing an angle other than 90 °, for example an angle, in particular considerably smaller, such as 75 ° or 60 ° or 45 ° or one,

in particular considerably, larger angles such as 105 ° or 120 ° or 150 °. Particularly advantageously, a longer section of the outer contour extends at least substantially parallel to a main extension direction of the Holmelements. In particular, the longer portion of the outer contour, preferably over its entire length, abuts on the longitudinal side of the Holmelements. By "at least substantially parallel" is intended in particular a

Alignment of a direction relative to a reference direction, in particular in a plane to be understood, the direction relative to the reference direction has a deviation in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °. Under one

 "Main extension direction" of an object is to be understood in particular as meaning a direction which runs parallel to a longest edge of a smallest imaginary cuboid which just completely encloses the object

Blade connection can be achieved.

In a particularly advantageous embodiment of the invention, it is proposed that a front edge of the stirring blade be at least partially flush with completes at least one edge of the Holmelements. Preferably, the front edge extends, starting from an end face of the Holmelements in a direction facing away from the connection element and in particular parallel to a main extension direction of the Holmelements. Particularly preferably, the front edge of the stirring blade forms an extension of the edge of the Holmelements. Advantageously, the front edge is intended to be arranged at the front with stirring in the stirring direction. As a result, advantageously a favorable stirring behavior can be achieved.

In a preferred embodiment of the invention it is proposed that the stirring blade and the spar member are connected to one another at an end face of the Holmelements. In particular, the stirring blade abuts with a shorter portion of the particular L-shaped outer contour, preferably over its entire length, on the end face of the Holmelements. Preferably, the stirring blade along the outer contour is connected to the spar member. Particularly preferably, the stirring blade is welded along its outer contour to the spar member, in particular along the entire length of the outer contour. As a result, advantageously a high bending stiffness of a stirring blade connection can be achieved.

Alternatively or additionally, it is proposed that the spar member and the stirring blade are integrally connected to each other. In particular, that is

Holmelement and the stirring blade made of a common, preferably plate-like workpiece, wherein the stirring blade is advantageously formed bent relative to the spar member from a plane. Advantageously, a material thickness of the stirring blade at least substantially corresponds to a material thickness of the Holmelements. It is conceivable that the carrier unit has above and / or below the Holmelements advantageous plate-like and / or flat reinforcing elements, in particular parallel to a

Main extension direction of the Holmelements arranged and / or are connected to this. Furthermore, it is conceivable that the entire stirring device is made of a single plate-like workpiece, from which in particular the connection element, the spar member and the stirring blade or all spar elements and all stirring blades of the stirring device are cut out or punched out. As a result, advantageously a simple and / or fast and / or cost-effective manufacturability can be achieved.

In addition, it is proposed that at least part of the carrier unit, in particular the entire carrier unit, is formed by a layer structure with at least two metal sheets. For example, several sheets

be arranged one above the other and in particular connected to each other and in particular form the entire carrier unit. For example, the carrier unit may comprise a central plate, which forms the rail element and the connection element. Furthermore, the carrier unit can at least one

Reinforcing plate, which reinforces the central plate, preferably in a region of the connecting element and / or in an area of the

Holmelements and in particular plan rests on the central plate and / or arranged above and / or below this. Basically there are several

Central plates and / or multiple reinforcing plates conceivable. So is

For example, conceivable that the carrier unit is constructed in the manner of a plywood plate from a plurality of parallel plates. Occurring edges can be rounded or chamfered. Furthermore, can be oblique

Surfaces of several obliquely stacked sheets with

in particular be formed bevelled edges. As a result, a high degree of flexibility with regard to a construction can advantageously be achieved. Furthermore, this makes it possible to use simple and / or cost-effective production methods for producing a stirring device.

Advantageous properties in terms of a construction and in particular a cost-effective manufacturability can be achieved with a stirring device with at least one stirring device according to the invention.

Furthermore, the invention is based on a method for producing a

Stirring device, with at least one carrier unit, the at least one Connecting element for connection to a drive shaft and at least one spar member for attachment of at least one stirring blade has.

It is proposed that the attachment element and the spar element are produced from a common plate-like workpiece. By means of a method according to the invention, advantageous properties can be achieved with regard to a manufacturing technology favorable production. Furthermore, a low-cost and / or easy-to-produce stirring device can be provided. Furthermore, a stirring device can be provided, which can be cut from a sheet, wherein in particular a number of necessary welding operations can be reduced and / or a strength can be increased. In particular, a hub and spars of a stirring device can be manufactured from a common workpiece, wherein the stirring device is advantageously seamless. In addition, a high degree of flexibility with regard to a connection of a stirring blade can be achieved. In particular, a stirring blade can be easily connected to a support spar. Advantageously, at least almost completely dispensed with a milling processing in a production. Furthermore, a spar with an advantageous geometry, in particular with regard to a simple production and / or a flexible and / or simple connection of a stirring blade can be provided. Preferably, the entire carrier unit is made from the plate-like workpiece. Particularly preferably, a carrier unit blank is cut or punched out of the plate-like workpiece and advantageously subsequently processed, for example by chamfering and / or rounding edges. Furthermore, for example, the recess is cut or punched out in the region of the connecting flange of the connecting element. Cutting out by means of burnout advantageously takes place, as a result of which, in particular, a need for edge processing and / or a

Necessity of a milling machining at least partially and advantageously completely eliminated. Advantageous then any stirring blades are the Stirring device welded to the corresponding spar elements. It is also conceivable that at least one central sheet is cut out or punched out, which comprises a blank for the attachment element, the spar element and the stirring blade and in particular for the entire carrier unit as well as all

Forms stirring blades. Advantageously, the central sheet is bent in certain areas to form the stirring blades. It is conceivable that then reinforcing sheets cut and / or punched out and with the

Central sheet and / or interconnected.

In particular, the method according to the invention can contain special method steps in which at least one of the above-described features of the stirring device according to the invention and / or of the stirring device according to the invention is generated and / or added and / or implemented,

in particular by a suitable manufacturing method.

The stirring device according to the invention or the method according to the invention should not be limited to the applications described above and

Be limited embodiments. In particular, the stirring device according to the invention or the method according to the invention for performing a function described herein can be one of a number of individual elements and / or components mentioned herein and / or

Units and / or process steps have different numbers.

In addition, in the value ranges indicated in this disclosure, values lying within the stated limits are also to be disclosed as disclosed and used as desired.

Drawings Further advantages can be found in the following description of the drawing. In the drawings, five embodiments of the invention are shown. The

Drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

1 a stirrer with a first stirring device in one

 schematic representation,

 Fig. 2 is an upper side of the first stirring device in one

 perspective view,

 Fig. 3 is a bottom of the first stirring device in a

 perspective view,

 4 shows the first stirring device in a schematic plan view, FIG. 5 shows the first stirring device in a schematic front view, FIG. 6 shows the first stirring device in a schematic side view, FIG. 7 shows a top side of a second stirring device in one

 perspective view,

 Fig. 8 is a bottom of the second stirring device in a

 perspective view,

 9 is a perspective view of a third stirring device, FIG. 10 is a perspective view of a fourth stirring device, FIG. 1 is a schematic front view of the fourth stirring device, FIG. 12 is a top view of a fifth stirring device

 perspective view,

 Fig. 13 is a bottom of the fifth stirring device in a

 perspective view,

 14 shows the fifth stirring device in a schematic front view, Fig. 15, the fifth stirring device in a schematic side view and

 Fig. 1 6 is a schematic flow diagram of a method for

Production of a stirring device. Description of the embodiments

Fig. 1 shows a stirrer 44a with a first stirring device 10a in a schematic representation. The first stirring device 10a is formed in the present case as a stirring member. The first stirring device 10a is at a

Drive shaft 1 6a of the stirrer 44a attached. The first stirring device 10a is fixed to a shaft flange 28a of the drive shaft 16a. The first

Stirring device 10a is rotatable about a rotation axis 46a.

In particular, the stirring device 10a is intended to rotate about the rotation axis 46a when agitated. The rotation axis 46a extends through a center 48a of the first stirring device 10a. The rotation axis 46a is parallel to a longitudinal direction of the drive shaft 16a.

FIG. 2 shows an upper side of the stirring device 10a in a perspective view. FIG. 3 shows a bottom side of the first stirring device 10a in a perspective view. Figures 4 to 6 show additional different schematic representations of the first stirring device 10a. The first stirring device 10a has a carrier unit 12a. The carrier unit 12a comprises a connection element 14a for connection to the drive shaft 16a. Furthermore, the carrier unit 12a comprises a spar element 18a for fastening at least one stirring blade 20a. The spar member 18a forms a spar for the stirring blade 20a. The spar member 18a and the connecting element 14a are integrally connected to each other. In the present case, the carrier unit 12a is formed in one piece. Further, the support unit 12a is formed of stainless steel. However, other materials and / or material combinations are also conceivable.

The spar member 18a has a portion 22a with a at least in

Essentially quadrangular cross section. In the present case, the

Section 22a has a rectangular cross-section. Furthermore, in the present case, the entire beam element 18a has a substantially quadrangular, in particular rectangular, cross section. At least in sections, the edges of the Holmelements 18a are chamfered. In the present case, the carrier unit 12a comprises a further bar element 50a. The further spar member 50a is formed to the spar member 18a point-symmetrical with respect to the center point 48a of the stirring device 10a. The first stirring device 10a has the stirring blade 20a. The stirring blade 20a is attached to the spar member 18a. Furthermore, in the present case, the first

 Stirring device 10a on another stirring blade 52a. The further stirring blade 52a is attached to the further spar member 50a. The further stirring blade 52a is formed with respect to the center point 48a of the first stirring device 10a point-symmetrical to the stirring blade 20a. The spar element 1 8a, the other

Holmelement 50a and the connection element 14a together form the

 Carrier unit 12a. The carrier unit 12a, the stirring blade 20a and the further stirring blade 52a jointly form the stirring device 10a.

The first stirring device 10a has in the present case a longitudinal extent of about 4 m. The longitudinal extent corresponds to a diameter of the stirring device 10a. But there are also other dimensions of one

 Stirring conceivable, especially other ratios of a length, a width and a height. For example, a longitudinal extent of a stirring device may be 0.1 m or 0.5 m or 1 m or 2 m or 3 m or 5 m or 6 m or even more. Furthermore, in the present case, the spar member 18a has a longitudinal extent of about 1 m. But there are others too

 Longitudinal extensions of a Holmelements conceivable, in particular in a similar aspect ratio relative to the longitudinal extent of the stirring device 10a as in the present case, or in a different aspect ratio.

The attachment member 14a and the spar member 18a are made of a

common plate-like workpiece produced. In the present case, the common workpiece is a stainless steel plate. Of course, other suitable materials are conceivable. A thickness of the workpiece is also about 7 cm in the present case. But there are also other thicknesses conceivable, such as 0.1 cm or 1 cm or 2 cm or 4 cm or 6 cm or 8 cm or 10 cm or 15 cm or more or less, or any between the thicknesses indicated. In the present case, the further beam element 50a is additionally produced from the common plate-like workpiece. The carrier unit 12a is made of the common plate-like workpiece, in particular cut or punched out. The beam element 18a and the connection element 14a have an at least substantially identical material thickness in a common connection region 24a. The material thickness is in the present case about 7 cm. The material thickness corresponds at least substantially to a thickness of the common plate-like workpiece. The attachment element 14a merges into the spar element 18a in the connection region 24a. Furthermore, the attachment element 14a and the spar element 18a have an at least substantially identical width in the connection region 24a. In addition, the attachment element 14a and the spar element 18a have an at least substantially identical cross section in the connection region 24a. The connection element 14a forms a connection flange 26a, which is provided for connection to the shaft flange 28a. In a mounted

State, the connection flange 26a is screwed to the shaft flange 28a.

The spar member 18a has in at least one direction 54a a

tapered cross-section on. In the present case, the direction 54a corresponds to a radial direction with respect to the axis of rotation 46a. Furthermore, in the present case, the bar element 18a has a first section 56a with a constant rectangular cross-section and a second section 58a with a tapering rectangular cross section adjacent thereto.

The stirring blade 20a is connected along a longitudinal side 30a of the Holmelements 18a with this. The stirring blade 20a is welded to the spar member 18a. But there are also other types of connection conceivable, as described above. The stirring blade 20 a has an L-shaped outer contour 60 a, which with the

Holmelement 18a is connected. The L-shaped outer contour 60a is connected to a Outer contour of Holmelements adapted 18a. A long leg section of the outer contour 60a bears against the longitudinal side 30a of the Holmelements 18a.

The stirring blade 20a and the spar member 18a are connected to each other at an end face 36a of the Holmelements 18a. In the present case, the stirring blade 20a is welded to the end face 36a of the Holmelements 18a. A short one

Leg portion of the outer contour 60a of the stirring blade 20a abuts against the end face 36a of the Holmelements 18a. Alternatively or additionally, it is conceivable that a spar element forms a slot, in particular at one end face, in which at least part of the stirring blade is inserted. The stirring blade can then be clamped to the spar member and / or welded.

A front edge 32a of the stirring blade 20a terminates at least in sections flush with an edge 34a of the Holmelements 18a. The edge 34 a is a front edge of the Holmelements 18 a. In the present case, the front edge 32a of the stirring blade 20a forms an extension of the edge 34a of the Holmelements 18a. FIGS. 7 to 15 show four further exemplary embodiments of the invention. The following descriptions and the drawings are essentially limited to the differences between the exemplary embodiments, wherein, with regard to identically named components, in particular with regard to components having the same reference numbers, in principle also to the drawings and / or the description of the other embodiments, in particular FIGS to 6, can be referenced. To distinguish the embodiments of the letter a is the reference numerals following the embodiments in Figures 1 to 6. In the embodiments of Figures 7 to 15 is the

Subparagraph a is replaced by the letters b to f. Figures 7 and 8 show perspective views of a second

Stirring device 10b. The second stirring device 10b has a carrier unit 12b. The carrier unit 12b comprises a connection element 14b for connection to a drive shaft, not shown. Furthermore, the carrier unit 12b comprises a spar element 18b for fastening at least one stirring blade 20b. The second Stirring device 10b has the stirring blade 20b. The beam element 18b and the connection element 14b are integrally connected to each other. In the present case, the carrier unit 12b is formed in one piece.

The spar member 18b has a portion 22b with a at least in

Essentially quadrangular cross section. In the present case, the

 Section 22b has a rectangular cross section. Furthermore, in the present case, the entire beam element 18b has a substantially quadrangular, in particular rectangular, cross section. At least in sections, the edges of the Holmelements 18b are chamfered.

The stirring blade 20b is rubberized in the present case. The agitating blade 20b is basically formed analogously to the agitating blade 20a of the embodiment of FIGS. 1 to 6 and fastened to the spar element 18b. However, in the present case, a rubber coating 62b is drawn over a metallic main body of the stirring blade 20b. Material and material thickness of the

Rubber cover 62b and its size can be adapted to an application in a simple and / or cost-effective manner.

FIG. 9 shows a third stirring device 10c in a perspective view

Presentation. The third stirring device 10c has a carrier unit 12c. The carrier unit 12c comprises a connection element 14c for connection to a drive shaft 16c. Furthermore, the carrier unit 12c comprises a spar element 18c for fastening at least one stirring blade 20c. The third stirring device 10c has the stirring blade 20c. The spar member 18c and the attachment member 14c are integrally connected to each other. In the present case, the carrier unit 12c is formed in one piece. The spar member 18c has a portion 22c with an at least in

Essentially quadrangular cross section. In the present case, the

Section 22c has a rectangular cross section. Furthermore, in the present case, the entire beam element 18c has a substantially quadrangular, in particular rectangular cross section. At least in sections, the edges of the Holmelements 18 c are chamfered.

In the present case, the spar member 18c is cuboid. A cross section of the Holmelements 18c is constant. The cross section of the

Holmelements 18c is unchanged along a longitudinal direction 64c of the Holmelements 18c. The longitudinal direction 64c of the Holmelements 18c corresponds to a radial direction. Such a configuration is particularly easy to produce. In particular, the carrier unit 12c can be cut or punched out of a plate-like workpiece, advantageously without having to make a chamfer at specific locations.

FIGS. 10 and 11 show different representations of a fourth stirring device 10d. The fourth stirring device 10d has a carrier unit 12d. The carrier unit 12d comprises a connection element 14d for connection to a drive shaft (not shown). Furthermore, the carrier unit 12d comprises a spar element 18d for fastening at least one stirring blade 20d. The fourth stirring device 10d has the stirring blade 20d. The spar member 18d and the connection element 14d are integrally connected to each other. In the present case, the carrier unit 12d is integrally formed.

The spar member 18d has a portion 22d with an at least in

Essentially quadrangular cross section. In the present case, the

Section 22d has a rectangular cross section. Furthermore, in the present case, the entire beam element 18d has a substantially quadrangular, in particular rectangular, cross section. At least in sections, the edges of the Holmelements 18d are chamfered. At least part of the support unit 12d is formed by a layer structure 38d with at least two sheets 40d, 42d, 43d. In the present case, the entire carrier unit 12d is formed by the layer structure 38d. Furthermore, in the present case, the layer structure 38d comprises a first sheet 40d, a second sheet 42d and a third sheet 43d. The sheets 40d, 42d, 43d are made of stainless steel educated. The second plate 42d is formed in the present case as a central plate. The second plate 42d has the attachment element 14d and the spar element 18d.

The first plate 40d is formed as an upper reinforcing plate. The third plate 43d is formed as a lower reinforcing plate. The first sheet 40d and the third sheet 43d each have further beam elements 66d, 68d and further connection elements 70d, 72d. The spar elements 18d, 66d, 68d together form a spar 74d of the carrier unit 1 2d. The

Connecting elements 14d, 70d, 72d together form a

Shaft connection unit 76d of the carrier unit 12d for connection to the

 Drive shaft off. The carrier unit 12d is constructed in the manner of a plywood plate from the sheets 40d, 42d, 43d.

The spar member 18d and the stirring blade 20d are integrally connected to each other.

The stirring blade 20d is part of the second sheet 42d. In production of the fourth stirring device 10d, the first plate 40d, the second plate 42d and the third plate 43d are cut or punched out of an output plate. If necessary, corners can be rounded or chamfered.

 Subsequently, the sheets 40d, 42d, 43d are arranged one above the other and glued together and / or welded and / or screwed and / or riveted. The second plate 42d is selectively deformed to form the stirring blade 20d. The stirring blade 20d is curved out of a plane of the handle member 18d and the attachment member 14d.

Figures 12 to 15 show different representations of a fifth

Stirring device 10e. The fifth stirring device 10e has a carrier unit 12e. The carrier unit 12e comprises a connection element 14e for connection to a drive shaft (not shown). Further, the carrier unit 12e includes

Holmelement 18e for attachment of at least one stirring blade, not shown. The spar member 18e and the attachment member 14e are integrally connected. In the present case, the carrier unit 12e is formed in one piece. The spar member 18e has a portion 22e with a at least in

Essentially quadrangular cross section. In the present case, the

Section 22e has a rectangular cross section.

The spar member 18e is formed at least partially twisted. In the present case, the spar member 18e is twisted in a connecting region 78e to the connecting element 14e. The connecting portion 78e corresponds to a torsion region. A straight portion 80e of the handle member 18e abuts on the connecting portion 78e. The straight area 80e of the

Holmelements 18e is rotated relative to the connection element 14e by about 20 °. As indicated above, however, other angles are conceivable. An attached stirring blade is set under stirring due to the torsion region of the support unit 12e. An employment of a stirring blade can be made by adjusting a Kordierungswinkels in a simple manner. The carrier unit 12e is for example by a cut or a

Punching a blank from a plate-like workpiece and a

subsequent targeted twisting of parts of the blank produced.

FIG. 16 shows a schematic flow diagram of a method for producing a stirring device, for example one of the stirring devices of the preceding embodiments. The stirring device has a

Carrier unit, which is a connection element for connection to a

 Has drive shaft and at least one spar member for attachment of at least one stirring blade. In a first method step 82f, a common plate-like workpiece, for example a sheet, of a suitable thickness is provided. In a second method step 84f, the

Connecting element and the spar member made from the common plate-like workpiece. In the present case, in the second method step 84f, a carrier unit blank is cut out of the workpiece. In a third method step 86f, the carrier unit blank is reworked in order to produce the carrier unit and in particular the stirring device. For example, in the third method step, 86f edges of the carrier unit may be rounded off and / or be chastised. It is also conceivable that in the third

Step 86f stirring blades welded to the carrier unit and / or stirring blades are made by bending a sheet. Of course, it is also conceivable that the third method step 86f comprises a plurality of corresponding substeps.

reference numeral

10 stirring device

12 carrier unit

14 connection element

16 drive shaft

18 beam element

20 stirring blade

 22 section

 24 connection area

26 connection flange

28 shaft flange

30 long side

 32 leading edge

34 edge

 36 front side

 38 layer structure

40 sheet metal

 42 sheet metal

 43 sheet metal

 44 mixer

 46 rotation axis

48 center

 50 spar element

52 stirring blade

 54 direction

 56 section

 58 section

 60 outer contour

62 rubber cover

64 longitudinal direction Holm element

Holm element

Connecting element Connecting element Holm

Shaft connection unit Connection area Range

step

step

step

Claims

claims Stirring device (10a; 10b; 10c; 10d; 10e) with at least one Carrier unit (12a; 12b; 12c; 12d; 12e) comprising at least one Connecting element (14a; 14b; 14c; 14d; 14e) for connection to a drive shaft (1 6a; 1 6c) and at least one spar element (18a; 18b; 18c; 18d; 18e) for fastening at least one stirring blade (20a, 20b; 20c 20d), characterized in that the beam element (18a; 18b; 18c; 18d; 18e) and the connecting element (14a; 14b; 14c; 14d; 14e) are integrally connected to one another. Stirring device (10a; 10b; 10c; 10d; 10e) according to the preamble of claim 1 and in particular according to claim 1, characterized in that the bar element (18a; 18b; 18c; 18d; 18e) has at least one section (22a) with an at least substantially quadrangular cross-section. Stirring device (10a; 10b; 10c; 10d; 10e) according to claim 1 or 2, characterized in that the beam element (18a; 18b; 18c; 18d; 18e) and the attachment element (14a; 14b; 14c; 14d; a common connection region (24a) have an at least substantially identical material thickness. 4. Stirring device (10a; 10b; 10c; 10d; 10e) according to one of the preceding claims, characterized in that the  Connecting element (14a, 14b, 14c, 14d, 14e) and the spar member (18a 18b, 18c, 18d, 18e) are made of a common plate-like workpiece. 5. Stirring device (10a; 10b; 10c; 10d; 10e) according to one of  preceding claims, characterized in that the  Connecting element (14a, 14b, 14c, 14d, 14e) at least one  Connecting flange (26 a) is formed, which for connection to a  Shaft flange (28 a) is provided. 6. stirring device (10a, 10b, 10d) according to one of the preceding  Claims, characterized in that the spar member (18a; 18b: 18d) in at least one direction (54a) is a tapered  Cross section has. 7. stirring device (1 Oe) according to one of the preceding claims,  characterized in that the spar member (18e) is formed at least partially twisted. 8. Stirring device (10a; 10b; 10c; 10d) according to one of the preceding claims, characterized by at least one stirring blade (20a; 20b; 20c; 20d) which is connected to the bar element (18a; 18b; 18c; 18d). 9. Stirring device (10a, 10b, 10c, 10d) according to claim 8, characterized characterized in that the agitating blade (20a; 20b; 20c; 20d) is connected thereto along a longitudinal side (30a) of the Holmelements (18a; 18b; 18c; 18d). 10. Stirring device (10a; 10b; 10c; 10d) according to claim 8 or 9, characterized in that a front edge (32a) of the stirring blade (20a; 20b; 20c; 20d) is at least partially flush with at least one edge (34a) of the Holmelements (18a, 18b, 18c, 18d). 1 1. Stirring device (10a; 10b; 10c; 10d; 10e) according to one of Claims 8 to 10, characterized in that the agitating blade (20a; 20b; 20c; 20d) and the bar element (18a; 18b; 18c; 18d) are arranged on one end face (36a) of the Holmelements (18a, 18b, 18c, 18d) are interconnected. 12. Stirring device (1 Od) according to one of claims 8 to 1 1, characterized  characterized in that the spar member (18d) and the stirring blade (20d) are integrally connected to each other. 13. stirring device (1 Od) according to one of the preceding claims,  characterized in that at least a part of the carrier unit (12d) is formed by a layer structure (38d) with at least two sheets (40d, 42d). 14. Stirring device with at least one stirring device (10a, 10b, 10c, 10d, 10e) according to one of the preceding claims. Method for producing a stirring device (10a; 10b; 10c; 10d; 10e), in particular according to one of claims 1 to 13, having at least one carrier unit (12a; 12b; 12c; 12d; 12e) which at least one Connecting element (14a; 14b; 14c; 14d; 14e) for connection to a drive shaft (1 6a; 1 6c) and at least one spar element (18a; 18b; 18c; 18d; 18e) for fastening at least one stirring blade (20a; 20b; 20c 20d), characterized in that the attachment element (14a; 14b; 14c; 14d; 14e) and the spar element (18a; 18b; 18c; 18d; 18e) are made from a common plate-like workpiece.