EP3431777B1 - Fastening of a mounting strut for a protective fan guard - Google Patents

Fastening of a mounting strut for a protective fan guard Download PDF

Info

Publication number
EP3431777B1
EP3431777B1 EP18184050.5A EP18184050A EP3431777B1 EP 3431777 B1 EP3431777 B1 EP 3431777B1 EP 18184050 A EP18184050 A EP 18184050A EP 3431777 B1 EP3431777 B1 EP 3431777B1
Authority
EP
European Patent Office
Prior art keywords
leg
fastening
fan guard
set forth
protective fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18184050.5A
Other languages
German (de)
French (fr)
Other versions
EP3431777A1 (en
Inventor
Michael Eccarius
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP3431777A1 publication Critical patent/EP3431777A1/en
Application granted granted Critical
Publication of EP3431777B1 publication Critical patent/EP3431777B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/31—Retaining bolts or nuts

Definitions

  • the invention relates to a fastening device of a fastening strut for a fan protection grille and a fan protection grille with at least one fastening strut and such a fastening device.
  • Fan protection grilles are used, for example, in axial fans as protection against contact. They usually include a large number of concentric bars spaced apart in the radial direction. In addition, the fan guards are often designed three-dimensionally, with their radial edge section being formed by mainly axially spaced grid bars. Grid bars spaced radially and axially from one another can also be provided in order to form oblique courses.
  • the grille bars of the fan guards are fastened and stabilized in a fixed position with one another by fastening struts that run radially over the grille bars.
  • the fan protection grilles are attached to the fan or the fan motor via the ends of the fastening struts.
  • the invention is based on the object of improving the fastening of a protective grille and/or increasing the fatigue strength properties of the fastening elements required for this purpose.
  • a fan protection grille with at least one fastening strut and at least one fastening device for fastening the fastening strut for the fan protection grille which has at least one first leg extending in a longitudinal direction and which is designed to engage over a plurality of bars of the fan protection grille, the at least one first leg has a free longitudinal end, and the fastening device is arranged in the area of the free longitudinal end of the at least first leg.
  • the fastening device is formed by an at least partially cube-shaped or cuboid-shaped fastening element and has at least one insertion receptacle which extends in a first spatial direction and into which at least the first leg can be inserted.
  • the insertion receptacle is designed as a blind hole extending in the first spatial direction.
  • an exemplary embodiment of the fastening device is characterized in that the fastening element has a device for fixing at least one fastening means, which is oriented in a second spatial direction that deviates from the first spatial direction of the at least one insertion receptacle.
  • the insertion receptacle forms a clamping area for locking the at least first leg, which is undersized so that a clamping connection is formed in the fastened state.
  • the insertion receptacle also accommodates at least the first leg in a clamp fit or clearance fit.
  • the fastening element is designed in two parts and that a clamping force Fsp for bracing and/or clamping the at least first leg is realized in the clamping area by the fastening element by means of a screw connection of both parts of the fastening element.
  • the fastening device is also aimed at designs in which the fastening strut has a second leg extending in the longitudinal direction essentially parallel to the first leg. Both thighs are arranged in insert receptacles or in the clamping area of the fastening element and are held by it.
  • the fastening strut has a second leg extending in the longitudinal direction essentially parallel to the first leg, the first and second legs being formed in one piece in a hairpin shape and an open end of the hairpin shape determining the free longitudinal end.
  • the “hairpin shape” is defined as a U-shape comprising two at least essentially parallel legs, which is closed on one side by a substantially round transition, so that a U-shape is created, the respective leg length and curvature of the transition being variable.
  • the fastening device is preferably arranged surrounding the first and second legs when viewed in the transverse direction. The free longitudinal end of the fastening strut is stabilized by the enclosing arrangement of the fastening device around the two legs, enables a higher moment capacity at the fastening point of the fan guard and ensures an increased service life during operation.
  • first and/or the second leg have a substantially round cross-sectional shape.
  • the fastening element is arranged so that it is flush with the free longitudinal end of the leg or legs.
  • the invention further comprises a fan guard with at least one, preferably a plurality, of fastening struts described above and a corresponding number of fastening devices on each of the fastening struts.
  • a fan protection grille has several bars which are overlapped by the at least one fastening strut.
  • the free longitudinal end of the fastening strut and the fastening element arranged thereon protrude radially inwards from the area of the bars and provide a connection point to the fan or fan motor.
  • FIG 1 is a fan protection grille 50 with a large number of circumferential bars 3 shown in a perspective view.
  • the fan protection grille 50 has four fastening struts 31 for mounting on a fan, between which shorter single-leg stiffening struts 30 are arranged, viewed in the radial direction.
  • the fastening struts 1 extend over all the bars 3 and each have the free longitudinal end at their radially inner sections.
  • Each of the fastening struts 31 is formed by two legs 11, 12 which run in a hairpin shape.
  • the closed U-shaped section protrudes radially beyond the fan protection grille 50 and each offers a connection point.
  • the shape of the fastening struts 31 is adapted to the course of the lattice bars 3, so that the fastening struts 1 have an outer, essentially vertically extending, an adjoining, radially extending, and an adjoining one have an oblique section.
  • the free longitudinal section adjoins the oblique section, in which the fastening struts 31 run straight in the radial direction.
  • the fastening device 13 is provided, which is also in the Figures 2 and 3 is shown in more detail.
  • Each fastening device 13 comprises according to Figure 2 and 3 a fastening element 14 made of a partially cuboid solid body, in which two insertion receptacles 19 are formed for inserting and fixing the leg ends of the legs 11, 12.
  • the fastening element 14 completely encloses the ends of the legs 11, 12.
  • a through hole 17 runs in the axial direction perpendicular to the extension of the insertion receptacles 19 for fastening the fastening struts 31 and therefore the fan protection grille 50.
  • the clamping area formed by the insertion receptacles 19 is undersized compared to the legs 11, 12 when viewed in the axial direction, so that in the attached state a Clamp connection according to Fig. 2 is formed.
  • the fastening element 14 can also be formed in two parts (not shown) and screwed together, with an axial clamping force Fsp being generated on the legs 11, 12, which is sufficient for both the required clamping forces of the clamping area and the transverse forces that can be absorbed (perpendicular to the axial clamping force ) are above the actual transverse forces Fq.
  • the fastening device 13 is flush with the free longitudinal end of the legs 11, 12, which are round in cross section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft eine Befestigungsvorrichtung einer Befestigungsstrebe für ein Lüfterschutzgitter sowie ein Lüfterschutzgitter mit wenigstens einer Befestigungsstrebe und einer derartigen Befestigungsvorrichtung.The invention relates to a fastening device of a fastening strut for a fan protection grille and a fan protection grille with at least one fastening strut and such a fastening device.

Lüfterschutzgitter werden beispielsweise bei Axiallüftern als Berührschutz eingesetzt. Sie umfassen üblicherweise eine Vielzahl von konzentrischen in radialer Richtung beabstandeten Gitterstäben. Zudem sind die Lüfterschutzgitter häufig dreidimensional ausgebildet, wobei ihr radialer Randabschnitt durch hauptsächlich axial beabstandete Gitterstäbe gebildet ist. Auch zueinander radial und axial beabstandete Gitterstäbe können vorgesehen sein, um schräge Verläufe auszubilden.Fan protection grilles are used, for example, in axial fans as protection against contact. They usually include a large number of concentric bars spaced apart in the radial direction. In addition, the fan guards are often designed three-dimensionally, with their radial edge section being formed by mainly axially spaced grid bars. Grid bars spaced radially and axially from one another can also be provided in order to form oblique courses.

Durch radial über die Gitterstäbe verlaufende Befestigungsstreben werden die Gitterstäbe der Lüfterschutzgitter miteinander positionsfest befestigt und stabilisiert. Zudem werden die Lüfterschutzgitter über die Enden der Befestigungsstreben an dem Lüfter bzw. dem Lüftermotor befestigt. Diese Anbindungsstellen sind hohen Belastungen ausgesetzt, da zum einen die durch den Betrieb des Lüftermotors erzeugten Biege- und Rotationsmomente, zum anderen im Betrieb erzeugte Schwingungen aufgenommen werden müssen. Die Anbindungsstelle der Befestigungsstrebe muss deshalb äußerst stabil ausgebildet sein, um Brüche der Strebe oder der Befestigungsmittel zu verhindern. Entsprechende Anforderungen werden generell auch an die Befestigungslösung der Streben gestellt.The grille bars of the fan guards are fastened and stabilized in a fixed position with one another by fastening struts that run radially over the grille bars. In addition, the fan protection grilles are attached to the fan or the fan motor via the ends of the fastening struts. These connection points are exposed to high loads because, on the one hand, the bending and rotational moments generated by the operation of the fan motor and, on the other hand, vibrations generated during operation must be absorbed. The connection point The fastening strut must therefore be extremely stable in order to prevent breakage of the strut or the fastening means. Corresponding requirements are generally also placed on the fastening solution for the struts.

Stand der Technik zu derartigen Befestigungsstreben und Lüfterschutzgittern ist beispielsweise in der DE 20 2016 103 323 U1 , der DE 299 00 923 U1 , der DE 10 2015 004 019 A1 oder der DE 33 11 660 C2 offenbart.The state of the art for such fastening struts and fan guards is, for example, in DE 20 2016 103 323 U1 , the DE 299 00 923 U1 , the DE 10 2015 004 019 A1 or the DE 33 11 660 C2 disclosed.

Nachteilig an bekannten Lösungen ist insbesondere die nicht immer ausreichende Vermeidung von Querkraftbelastungen und die häufig einteilig oder stoffschlüssig realisierten Befestigungsmittel am oder in Schutzgitterelementen wie beispielsweise Tragstreben.The disadvantage of known solutions is, in particular, the insufficient avoidance of transverse force loads and the fastening means, which are often implemented in one piece or in a cohesive manner, on or in protective grid elements such as support struts.

Der Erfindung liegt die Aufgabe der Verbesserung der Befestigung eines Schutzgitters und/oder die Steigerung der Dauerfestigkeitseigenschaften der dazu erforderlichen Befestigungselemente zu Grunde.The invention is based on the object of improving the fastening of a protective grille and/or increasing the fatigue strength properties of the fastening elements required for this purpose.

Diese Aufgabe wird durch die Merkmalskombination gemäß Patentanspruch 1 gelöst.This task is achieved by the combination of features according to claim 1.

Erfindungsgemäß wird ein Lüfterschutzgitter mit mindestens einer Befestigungsstrebe und mindestens einer Befestigungsvorrichtung zur Befestigung der Befestigungsstrebe für das Lüfterschutzgitter vorgeschlagen, das zumindest einen sich in einer Längsrichtung erstreckenden ersten Schenkel aufweist, der ausgebildet ist, mehrere Gitterstäbe des Lüfterschutzgitters zu übergreifen, wobei der zumindest eine erste Schenkel ein freies Längsende aufweist, und im Bereich des freien Längsendes des zumindest ersten Schenkels die Befestigungsvorrichtung angeordnet ist. Die Befestigungsvorrichtung ist durch ein zumindest teilweise würfelförmiges oder quaderförmiges Befestigungselement ausgebildet und weist mindestens eine Einsteckaufnahme auf, die sich in einer ersten Raumrichtung erstreckt und in welche zumindest der erste Schenkel einsteckbar ist.According to the invention, a fan protection grille with at least one fastening strut and at least one fastening device for fastening the fastening strut for the fan protection grille is proposed, which has at least one first leg extending in a longitudinal direction and which is designed to engage over a plurality of bars of the fan protection grille, the at least one first leg has a free longitudinal end, and the fastening device is arranged in the area of the free longitudinal end of the at least first leg. The fastening device is formed by an at least partially cube-shaped or cuboid-shaped fastening element and has at least one insertion receptacle which extends in a first spatial direction and into which at least the first leg can be inserted.

Erfindungsgemäß ist vorgesehen, dass die Einsteckaufnahme als Sackloch mit Erstreckung in der ersten Raumrichtung ausgebildet ist.According to the invention it is provided that the insertion receptacle is designed as a blind hole extending in the first spatial direction.

Ferner ist ein Ausführungsbeispiel der Befestigungsvorrichtung dadurch gekennzeichnet, dass das Befestigungselement eine Einrichtung zur Festlegung von wenigstens einem Befestigungsmittel aufweist, das in einer von der ersten Raumrichtung der wenigstens einen Einsteckaufnahme abweichenden zweiten Raumrichtung orientiert ist.Furthermore, an exemplary embodiment of the fastening device is characterized in that the fastening element has a device for fixing at least one fastening means, which is oriented in a second spatial direction that deviates from the first spatial direction of the at least one insertion receptacle.

Als vorteilhafte Ausführung wird bei der Befestigungsvorrichtung vorgesehen, dass die Einsteckaufnahme einen Klemmbereich zur Arretierung des zumindest ersten Schenkels ausbildet, der untermaßig dimensioniert ist, sodass im befestigten Zustand eine Klemmverbindung gebildet ist. Die Einsteckaufnahme nimmt erfindungsgemäß auch zumindest den ersten Schenkel in einer Klemmpassung oder Spielpassung auf.As an advantageous embodiment, it is provided in the fastening device that the insertion receptacle forms a clamping area for locking the at least first leg, which is undersized so that a clamping connection is formed in the fastened state. According to the invention, the insertion receptacle also accommodates at least the first leg in a clamp fit or clearance fit.

Ferner kann vorgesehen sein, dass das Befestigungselement zweiteilig ausgebildet ist und im Klemmbereich durch das Befestigungselement eine Spannkraft Fsp zur Verspannung und/oder Klemmung des zumindest ersten Schenkels durch eine Schraubenverbindung beider Teile des Befestigungselements realisiert ist.Furthermore, it can be provided that the fastening element is designed in two parts and that a clamping force Fsp for bracing and/or clamping the at least first leg is realized in the clamping area by the fastening element by means of a screw connection of both parts of the fastening element.

Die Spannkraft wird vorzugsweise derart gewählt, dass sowohl die erforderlichen Klemmkräfte des Klemmbereiches als auch die aufnehmbaren Querkräfte über den real auftretenden Querkräften Fq liegen, wobei die Querkräfte gebildet werden durch Fq= µ * Fsp (µ entspricht der Reibungszahl zwischen den verklemmten aneinander anliegenden Bauteilen, welche die Querkraft aufnehmen).The clamping force is preferably selected in such a way that both the required clamping forces of the clamping area and the transverse forces that can be absorbed are above the actually occurring transverse forces Fq, whereby the transverse forces are formed by Fq = µ * Fsp (µ corresponds to the coefficient of friction between the clamped, adjacent components, which absorb the shear force).

Die Befestigungsvorrichtung ist auch auf Ausführungen gerichtet, bei denen die Befestigungsstrebe einen sich in Längsrichtung im Wesentlichen parallel zu dem ersten Schenkel erstreckenden zweiten Schenkel aufweist. Beide Schenkel sind in Einsteckaufnahmen bzw. im Klemmbereich des Befestigungselements angeordnet und werden von diesem gehalten.The fastening device is also aimed at designs in which the fastening strut has a second leg extending in the longitudinal direction essentially parallel to the first leg. Both thighs are arranged in insert receptacles or in the clamping area of the fastening element and are held by it.

In einer Weiterbildung ist vorgesehen, dass die Befestigungsstrebe einen sich in Längsrichtung im Wesentlichen parallel zu dem ersten Schenkel erstreckenden zweiten Schenkel aufweist, wobei der erste und der zweite Schenkel einteilig in einer Haarnadelform ausgebildet sind und ein offenes Ende der Haarnadelform das freie Längsende bestimmt. Die "Haarnadelform" ist definiert als zwei zumindest im Wesentlichen parallele Schenkel umfassende U-Form, die einseitig durch einen im Wesentlichen runden Übergang geschlossen ist, so dass eine U-Form entsteht, wobei die jeweilige Schenkellänge und Krümmung des Übergangs variabel sind. Dabei wird vorzugsweise die Befestigungsvorrichtung in der Querrichtung gesehen den ersten und zweiten Schenkel umschließend angeordnet. Das freie Längsende der Befestigungsstrebe ist durch die umschließende Anordnung der Befestigungsvorrichtung um die beiden Schenkeln stabilisiert, ermöglicht eine höhere Momentaufnahme am Befestigungspunkt des Lüfterschutzgitters und gewährleistet eine gesteigerte Lebensdauer im Betrieb.In a further development it is provided that the fastening strut has a second leg extending in the longitudinal direction essentially parallel to the first leg, the first and second legs being formed in one piece in a hairpin shape and an open end of the hairpin shape determining the free longitudinal end. The “hairpin shape” is defined as a U-shape comprising two at least essentially parallel legs, which is closed on one side by a substantially round transition, so that a U-shape is created, the respective leg length and curvature of the transition being variable. The fastening device is preferably arranged surrounding the first and second legs when viewed in the transverse direction. The free longitudinal end of the fastening strut is stabilized by the enclosing arrangement of the fastening device around the two legs, enables a higher moment capacity at the fastening point of the fan guard and ensures an increased service life during operation.

Als vorteilhafte Variante kann ferner vorgesehen werden, dass der der erste und/oder der zweite Schenkel eine im Wesentlichen runde Querschnittsform aufweisen.As an advantageous variant, it can also be provided that the first and/or the second leg have a substantially round cross-sectional shape.

Im Bereich des freien Längsendes der Befestigungsstrebe wird das Befestigungselement so angeordnet, dass es bündig mit dem freien Längsende des bzw. der Schenkel abschließt.In the area of the free longitudinal end of the fastening strut, the fastening element is arranged so that it is flush with the free longitudinal end of the leg or legs.

Die Erfindung umfasst ferner ein Lüfterschutzgitter mit wenigstens einer, vorzugsweise einer Vielzahl von vorstehend beschriebenen Befestigungsstreben und einer entsprechenden Anzahl an Befestigungsvorrichtungen an jeder der Befestigungsstreben. Ein derartiges Lüfterschutzgitter weist mehrere Gitterstäbe auf, die von der wenigstens einen Befestigungsstrebe übergriffen sind. Das freie Längsende der Befestigungsstrebe und das daran angeordnete Befestigungselement stehen gegenüber dem Bereich der Gitterstäbe nach radial innen hervor und bieten einen Anbindungspunkt an den Lüfter oder Lüftermotor.The invention further comprises a fan guard with at least one, preferably a plurality, of fastening struts described above and a corresponding number of fastening devices on each of the fastening struts. Such a fan protection grille has several bars which are overlapped by the at least one fastening strut. The The free longitudinal end of the fastening strut and the fastening element arranged thereon protrude radially inwards from the area of the bars and provide a connection point to the fan or fan motor.

Andere vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet bzw. werden nachstehend zusammen mit der Beschreibung der bevorzugten Ausführung der Erfindung anhand der Figuren näher dargestellt. Es zeigen:

Fig. 1
ein Lüfterschutzgitter in einer perspektivischen Ansicht mit Befestigungsstreben und Befestigungsvorrichtungen;
Fig. 2
eine Befestigungsvorrichtung am freien Ende einer der Befestigungsstreben in vergrößerter Detailansicht;
Fig. 3
eine Schnittansicht durch die Befestigungsvorrichtung.
Other advantageous developments of the invention are characterized in the subclaims or are shown in more detail below together with the description of the preferred embodiment of the invention with reference to the figures. Show it:
Fig. 1
a fan guard in a perspective view with fastening struts and fastening devices;
Fig. 2
a fastening device at the free end of one of the fastening struts in an enlarged detailed view;
Fig. 3
a sectional view through the fastening device.

Gleiche Bezugszeichen benennen gleiche Teile in allen Ansichten.Like reference numerals designate like parts throughout all views.

In Figur 1 ist ein Lüfterschutzgitter 50 mit einer Vielzahl von umlaufenden Gitterstäben 3 in einer perspektivischen Ansicht dargestellt. In Umfangsrichtung verteilt weist das Lüfterschutzgitter 50 zur Montage an einem Lüfter vier Befestigungsstreben 31 auf, zwischen denen jeweils in radialer Richtung gesehen kürzere einschenklige Versteifungsstreben 30 angeordnet sind. Die Befestigungsstreben 1 übergreifen alle Gitterstäbe 3 und weisen an ihren radial innen liegenden Abschnitten jeweils das freie Längsende auf. Jede der Befestigungsstreben 31 ist durch zwei Schenkel 11, 12 gebildet, die in einer Haarnadelform verlaufen. Im radial außen liegenden Bereich der Befestigungsstreben 31 steht der jeweils geschlossene U-förmige Abschnitt radial über das Lüfterschutzgitter 50 hervor und bietet jeweils eine Anbindungsstelle. Die Form der Befestigungsstreben 31 ist an den Verlauf der Gitterstäbe 3 angepasst, so dass die Befestigungsstreben 1 einen äußeren im Wesentlichen vertikal verlaufenden, einen sich daran anschließenden radial verlaufenden, einen sich daran anschließenden schrägen Abschnitt aufweisen. An den schrägen Abschnitt schließt sich der freie Längsabschnitt an, in dem die Befestigungsstreben 31 gerade in radialer Richtung verlaufen. In diesem Abschnitt ist jeweils die Befestigungsvorrichtung 13 vorgesehen, die auch in den Figuren 2 und 3 näher gezeigt ist.In Figure 1 is a fan protection grille 50 with a large number of circumferential bars 3 shown in a perspective view. Distributed in the circumferential direction, the fan protection grille 50 has four fastening struts 31 for mounting on a fan, between which shorter single-leg stiffening struts 30 are arranged, viewed in the radial direction. The fastening struts 1 extend over all the bars 3 and each have the free longitudinal end at their radially inner sections. Each of the fastening struts 31 is formed by two legs 11, 12 which run in a hairpin shape. In the radially outer area of the fastening struts 31, the closed U-shaped section protrudes radially beyond the fan protection grille 50 and each offers a connection point. The shape of the fastening struts 31 is adapted to the course of the lattice bars 3, so that the fastening struts 1 have an outer, essentially vertically extending, an adjoining, radially extending, and an adjoining one have an oblique section. The free longitudinal section adjoins the oblique section, in which the fastening struts 31 run straight in the radial direction. In this section, the fastening device 13 is provided, which is also in the Figures 2 and 3 is shown in more detail.

Jede Befestigungsvorrichtung 13 umfasst gemäß Figur 2 und 3 ein Befestigungselement 14 aus einem teilweise quaderförmigen Vollkörper, in dem zwei Einsteckaufnahmen 19 zum Einstecken und Fixieren der Schenkelenden der Schenkel 11, 12 ausgebildet sind. Das Befestigungselement 14 umschließt die Enden der Schenkel 11, 12 vollständig. In axialer Richtung senkrecht zur Erstreckung der Einsteckaufnahmen 19 verläuft ein Durchgangsloch 17 zur Befestigung der Befestigungsstreben 31 und mithin des Lüfterschutzgitters 50. Der von den Einsteckaufnahmen 19 ausgebildete Klemmbereich wird in axialer Richtung gesehen gegenüber den Schenkeln 11, 12 untermaßig dimensioniert, sodass im befestigten Zustand eine Klemmverbindung gemäß Fig. 2 gebildet ist. Das Befestigungselement 14 kann auch zweiteilig gebildet (nicht gezeigt) und miteinander verschraubt werden, wobei eine axiale Spannkraft Fsp auf die Schenkel 11, 12 erzeugt wird, die ausreicht, dass sowohl die erforderlichen Klemmkräfte des Klemmbereiches als auch die aufnehmbaren Querkräfte (senkrecht zur axialen Spannkraft) über den real auftretenden Querkräften Fq liegen. Die Befestigungsvorrichtung 13 schließt bündig mit dem freien Längsende der im Querschnitt runden Schenkel 11, 12 ab.Each fastening device 13 comprises according to Figure 2 and 3 a fastening element 14 made of a partially cuboid solid body, in which two insertion receptacles 19 are formed for inserting and fixing the leg ends of the legs 11, 12. The fastening element 14 completely encloses the ends of the legs 11, 12. A through hole 17 runs in the axial direction perpendicular to the extension of the insertion receptacles 19 for fastening the fastening struts 31 and therefore the fan protection grille 50. The clamping area formed by the insertion receptacles 19 is undersized compared to the legs 11, 12 when viewed in the axial direction, so that in the attached state a Clamp connection according to Fig. 2 is formed. The fastening element 14 can also be formed in two parts (not shown) and screwed together, with an axial clamping force Fsp being generated on the legs 11, 12, which is sufficient for both the required clamping forces of the clamping area and the transverse forces that can be absorbed (perpendicular to the axial clamping force ) are above the actual transverse forces Fq. The fastening device 13 is flush with the free longitudinal end of the legs 11, 12, which are round in cross section.

Claims (9)

  1. A protective fan guard (50) with at least one mounting strut and at least one fastening device for fastening the mounting strut of the protective fan guard (50), having at least one first leg (11) that extends in a longitudinal direction and engages over a plurality of guard bars (3) of the protective fan guard (50), wherein the at least one first leg (11) has a free longitudinal end and the fastening device (13) is arranged in the vicinity of the free longitudinal end of the at least one leg (11), wherein the fastening device (13) is formed by an at least partially cubiform or cuboidal fastening element (14) and the fastening element has at least one insertion receptacle (19) which extends in a first spatial direction and into which at least the first leg (11) can be inserted, wherein the at least one insertion receptacle (19) is embodied as a blind hole extending in the first spatial direction, and wherein the at least one insertion receptacle (19) receives at least the first leg (11) in a clamp fit or clearance fit.
  2. The protective fan guard as set forth in any one of the preceding claims, characterized in that the fastening element (14) has a device for securing at least one fastening means which is oriented in a second spatial direction that differs from the first spatial direction of the at least one insertion receptacle (19).
  3. The protective fan guard as set forth in at least one of the preceding claims, characterized in that the insertion receptacle (19) forms a clamping region for locking the at least one first leg (11) which is undersized, so that a clamp connection is formed in the fastened state.
  4. The protective fan guard as set forth in the preceding claim, characterized in that the fastening element is embodied in two parts and a clamping force Fsp for bracing and/or clamping the at least one first leg (11) is achieved in the clamping region by means of the fastening element (14) through a screw connection of the two parts of the fastening element (14).
  5. The protective fan guard as set forth in the preceding claim, characterized in that the clamping force is selected such that both the required clamping forces of the clamping region and the supportable transverse forces are greater than the actually occurring transverse forces Fq, the transverse forces being constituted by Fq = Fsp.
  6. The protective fan guard as set forth in the preceding claim, characterized in that the mounting strut has a second leg (12) which extends in the longitudinal direction substantially parallel to the first leg (11), and both legs (11, 12) are arranged in the clamping region.
  7. The protective fan guard as set forth in the preceding claim, characterized in that the first and second legs (11, 12) are integrally formed in a hairpin shape and an open end of the hairpin shape defines the free longitudinal end.
  8. The protective fan guard as set forth in any one of the preceding claims, characterized in that the first and/or the second leg (11, 12) have a substantially round cross-sectional shape.
  9. The protective fan guard as set forth in at least one of the preceding claims, characterized in that it ends flush with the free longitudinal end of the at least first leg (11).
EP18184050.5A 2017-07-19 2018-07-17 Fastening of a mounting strut for a protective fan guard Active EP3431777B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017116284.4A DE102017116284A1 (en) 2017-07-19 2017-07-19 Attachment of a fixing brace for a fan guard

Publications (2)

Publication Number Publication Date
EP3431777A1 EP3431777A1 (en) 2019-01-23
EP3431777B1 true EP3431777B1 (en) 2024-02-14

Family

ID=62981138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18184050.5A Active EP3431777B1 (en) 2017-07-19 2018-07-17 Fastening of a mounting strut for a protective fan guard

Country Status (2)

Country Link
EP (1) EP3431777B1 (en)
DE (1) DE102017116284A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5271588A (en) * 1992-07-17 1993-12-21 General Electric Company Multi-piece tube clamp

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB601222A (en) * 1944-10-04 1948-04-30 Berkeley & Young Ltd Improvements in, or relating to, electric fans
DE3311660A1 (en) 1983-03-30 1984-10-04 Siemens AG, 1000 Berlin und 8000 München Axial fan
DE4012808C2 (en) * 1989-11-24 1996-09-05 Pural Profilwerk Gmbh Connection fitting for building profiles
FR2671385B1 (en) * 1991-01-03 1993-07-30 Maillet Eric ASSEMBLY PART OF LONGILIGNED ELEMENTS.
DE29900923U1 (en) 1999-01-20 2000-07-06 ebm Werke GmbH & Co., 74673 Mulfingen Arrangement for the vibration-isolating bracket of an electric motor
DE10111397B4 (en) * 2001-03-09 2010-04-15 Ebm-Papst Mulfingen Gmbh & Co. Kg Protective grille for fans
WO2008037023A1 (en) * 2006-09-28 2008-04-03 Black Adda Pty Ltd Attachment clamp for a pair of elongate members
DE202009010930U1 (en) * 2009-08-14 2009-11-26 Tiemann Schutz-Systeme Gmbh Attachment for mesh fencing
DE102011121025A1 (en) * 2011-08-18 2013-02-21 Ziehl-Abegg Ag Motor suspension for fans, preferably axial fans, and method for producing a ventilation grille of such engine mount
DE102015004019A1 (en) * 2015-03-26 2016-09-29 Uwe Stadtmüller Guard; Method for producing a protective grille for fans
DE202015002378U1 (en) * 2015-03-26 2015-06-02 Uwe Stadtmüller guard
DE202016103323U1 (en) 2016-06-23 2016-07-06 Ebm-Papst Mulfingen Gmbh & Co. Kg Mounting strut for a fan guard

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5271588A (en) * 1992-07-17 1993-12-21 General Electric Company Multi-piece tube clamp

Also Published As

Publication number Publication date
EP3431777A1 (en) 2019-01-23
DE102017116284A1 (en) 2019-01-24

Similar Documents

Publication Publication Date Title
DE202016103323U1 (en) Mounting strut for a fan guard
EP1734640B1 (en) Device for fixing an electrical apparatus to an electric motor
DE112018007572T5 (en) Attachment structure and energy conversion device using the attachment structure
EP3260704B1 (en) Fastening strut for a protective grating for a fan
DE102019117864A1 (en) Fastening device for two housing parts, in particular fan housing parts
DE202017104300U1 (en) Attachment of a fixing brace for a fan guard
EP3085972A1 (en) Mounting assembly
EP3431777B1 (en) Fastening of a mounting strut for a protective fan guard
DE202017104303U1 (en) Attachment of a fixing brace for a fan guard
EP3431778B1 (en) Fastening of a fastening strut for a protective grating for a fan
EP3431776B1 (en) Fastening of a mounting strut for a protective fan guard
EP3431775B1 (en) Fastening of a mounting strut for a protective fan guard
EP3431772B1 (en) Fastening of a mounting strut for a protective fan guard
EP3431774B1 (en) Fastening of a mounting strut for a protective fan guard
EP3431773B1 (en) Fastening of a fastening strut for a protective grating for a fan
DE202017104301U1 (en) Attachment of a fixing brace for a fan guard
DE202017104306U1 (en) Attachment of a fixing brace for a fan guard
DE202019103642U1 (en) Fastening device of two housing parts, in particular fan housing parts
DE102005032535B4 (en) Device for fastening at least one object to a carrier part provided with a fastening bolt
DE202010005777U1 (en) Fast-assembly hinge
DE202017104302U1 (en) Attachment of a fixing brace for a fan guard
DE202017104304U1 (en) Attachment of a fixing brace for a fan guard
DE202017104305U1 (en) Attachment of a fixing brace for a fan guard
DE102015202979B4 (en) Vibration damping device
DE102012109477A1 (en) mainspring

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190722

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ECCARIUS, MICHAEL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20220111

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20230921

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20231129

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502018014101

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20240214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240614

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240515

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240514

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240214

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240214