EP3431772A1 - Fixation d'une barre de fixation pour une grille de protection de ventilateur - Google Patents

Fixation d'une barre de fixation pour une grille de protection de ventilateur Download PDF

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Publication number
EP3431772A1
EP3431772A1 EP18184035.6A EP18184035A EP3431772A1 EP 3431772 A1 EP3431772 A1 EP 3431772A1 EP 18184035 A EP18184035 A EP 18184035A EP 3431772 A1 EP3431772 A1 EP 3431772A1
Authority
EP
European Patent Office
Prior art keywords
fastening
leg
fastening device
clamping
sleeve
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.)
Granted
Application number
EP18184035.6A
Other languages
German (de)
English (en)
Other versions
EP3431772B1 (fr
Inventor
Michael Eccarius
Sven BECK
Sebastian Bundschuh
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 EP3431772A1 publication Critical patent/EP3431772A1/fr
Application granted granted Critical
Publication of EP3431772B1 publication Critical patent/EP3431772B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 guard and a fan guard with at least one attachment strut and such a fastening device.
  • Fan guards are used, for example, with axial fans as shock protection. They typically include a plurality of concentric, radially spaced bars. In addition, the fan guards are often formed three-dimensional, with its radial edge portion is formed by mainly axially spaced grid bars. Also mutually radially and axially spaced bars can be provided be to form oblique courses.
  • the bars of the fan guards are fixed together fixed position and stabilized.
  • the fan guards are attached to the fan or fan motor via the ends of the mounting braces.
  • a disadvantage of known solutions is in particular the not always sufficient avoidance of lateral force loads and often one-piece or cohesively realized fasteners on or in protective grid elements such as supporting struts.
  • the invention is based on the object of improving the attachment of a protective grid and / or increasing the fatigue strength properties of the fasteners required for this purpose.
  • a fastening device for fastening a fastening strut for a fan guard, which has at least one first leg extending in a longitudinal direction with a defined clamping surface which is designed to overlap a plurality of grid bars of the fan guard, wherein the at least one first leg has a free longitudinal end , And in the region of the free longitudinal end of the at least first leg, the fastening device is arranged.
  • the fastening device comprises a fastening sleeve, which is designed in such a way that at least one clamping region receiving at least the first leg is formed and supported, wherein the fastening sleeve has a receptacle cup-shaped sunk on a side opposite the at least one limb.
  • the fastening device has only a single fastening sleeve.
  • the clamping region is bounded by at least one collar provided on the fastening sleeve.
  • the clamping surface has a flattened, preferably cold-deformed region, which corresponds to the clamping region. As a result, the contact surface is increased.
  • an embodiment of the fastening device is characterized in that the fastening sleeve is clamped axially relative to the leg for fixing the protective grid.
  • the fastening sleeve can be braced by a screw.
  • the screw connection can be done by means of an engaging in the cup-shaped receptacle recorded screw.
  • the clamping area formed by the fastening sleeve is dimensioned undersized with respect to the leg, so that in the attached state, a clamping connection is formed.
  • an embodiment is included, which is characterized in that the clamping area formed by the fastening sleeve with respect to the leg is so heavily undersized, so that at least one of the elemental materials of the leg or the mounting sleeve at least partially in the field of plastic and / or elastic-plastic flow is claimed.
  • a clamping force Fsp for clamping and / or clamping is realized by a screw connection in the clamping area through the fastening sleeve.
  • the fastening device is also directed to embodiments in which the fastening strut has a second leg extending in the longitudinal direction substantially parallel to the first leg. Both legs are arranged in the clamping area and are held by the fastening device.
  • the fastening strut has a second leg extending in the longitudinal direction substantially parallel to the first leg, wherein the first and the second leg are integrally formed in a hairpin shape and an open end of the hairpin shape determines the free longitudinal end.
  • the "hairpin shape" is defined as two U-shaped at least substantially parallel legs, which is closed on one side by a substantially circular transition, so that a U-shape is formed, wherein the respective leg length and curvature of the transition are variable.
  • the fastening device is preferably arranged in the transverse direction between the first and second leg. The free longitudinal end of the mounting strut is stabilized by the arrangement of the fastening device between the two legs, allows a higher snapshot at the attachment point of the fan guard and ensures an increased life during operation.
  • first and / or the second leg have a substantially round cross-sectional shape.
  • the fastening sleeve In the region of the free longitudinal end of the fastening strut, the fastening sleeve 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, above-described attachment struts and a corresponding number of attachment devices on each of the attachment struts.
  • a fan guard has a plurality of bars, which are overlapped by the at least one attachment strut.
  • the free longitudinal end of the mounting strut and the arranged thereon Fastener protrude radially inwardly from the region of the grid bars and provide a connection point to the fan or fan motor.
  • FIG. 1 a fan guard 50 is shown with a plurality of circumferential bars 3 in a perspective view.
  • the fan guard 50 has four attachment struts 31 for mounting on a fan, between which shorter one-sided reinforcing struts 30 are arranged, each seen in the radial direction.
  • the fastening struts 1 overlap all grid bars 3 and have at their radially inner portions in each case the free longitudinal end.
  • Each of the attachment struts 31 is formed by two legs 11, 12 which extend in a hairpin shape. Both legs 11, 12 have a defined clamping surface 39, with which the fastening sleeve 14 cooperates in a manner that their covenant 24 rests flat.
  • the respectively closed U-shaped section protrudes radially beyond the fan guard grille 50 and in each case offers a connection point.
  • the shape of the attachment struts 31 is adapted to the course of the bars 3, so that the attachment struts 1 have an outer substantially vertically extending, an adjoining radially extending, an adjoining oblique portion.
  • the oblique section is adjoined by the free longitudinal section, in which the fastening struts 31 run straight in the radial direction.
  • the fastening device 13 is provided in each case, which also in the Figures 2 and 3 is shown in more detail.
  • Each fastening device 13 comprises according to FIG. 2 and 3 a fastening sleeve 14, which forms the clamping region 19.
  • the leg ends of the legs 11, 12 are inserted into the clamping region 19.
  • the fastening sleeve 14 has the legs 11, 12 completely overlapping collar 24, which also bounds the clamping portion 19.
  • this is done via a screw, not shown, which is guided by the screw hole 17 provided in the cup-shaped receptacle 59 and the fixing sleeve 14 can move or fix in the axial direction.
  • the cup-shaped recessed receptacle 59 forms an axially projecting circumferential edge portion 28, which closes the fastening sleeve 14.
  • the clamping portion 19 is viewed in the axial direction with respect to the legs 11, 12 undersized, so that in the attached state, a clamping connection according to Fig. 2 is formed.
  • the fastening sleeve 14 generates in the clamped state in the clamping area 19 an axial clamping force Fsp, which is sufficient that both the required clamping forces of the clamping portion 19 and the aufappelbaren transverse forces (perpendicular to the axial clamping force) are above the real occurring transverse forces Fq.
  • the adjacent component to which the fan guard 50 is fastened by means of the fastening device 13 is not shown.
  • the fastening sleeve 14 of the fastening device 13 is flush with the free longitudinal end of the round cross-section legs 11, 12 from.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP18184035.6A 2017-07-19 2018-07-17 Fixation d'une barre de fixation pour une grille de protection de ventilateur Active EP3431772B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017116289.5A DE102017116289A1 (de) 2017-07-19 2017-07-19 Befestigung einer Befestigungsstrebe für ein Lüfterschutzgitter

Publications (2)

Publication Number Publication Date
EP3431772A1 true EP3431772A1 (fr) 2019-01-23
EP3431772B1 EP3431772B1 (fr) 2024-02-14

Family

ID=62981126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18184035.6A Active EP3431772B1 (fr) 2017-07-19 2018-07-17 Fixation d'une barre de fixation pour une grille de protection de ventilateur

Country Status (2)

Country Link
EP (1) EP3431772B1 (fr)
DE (1) DE102017116289A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102239A (en) * 1977-02-17 1978-07-25 Dallas Charles M Washer
DE3311660C2 (fr) 1983-03-30 1990-07-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
DE29900923U1 (de) 1999-01-20 2000-07-06 ebm Werke GmbH & Co., 74673 Mulfingen Anordnung zur schwingungsisolierenden Halterung eines Elektromotors
DE10111397A1 (de) * 2001-03-09 2002-09-12 Ebm Werke Gmbh & Co Kg Schutzgitter für Ventilatoren
GB2424253A (en) * 2005-03-14 2006-09-20 L M Products Ltd Fastening system
DE102011121025A1 (de) * 2011-08-18 2013-02-21 Ziehl-Abegg Ag Motoraufhängung für Ventilatoren, vorzugsweise Axialventilatoren, sowie Verfahren zur Herstellung eines Lüftungsgitters einer solchen Motoraufhängung
DE202016103323U1 (de) 2016-06-23 2016-07-06 Ebm-Papst Mulfingen Gmbh & Co. Kg Befestigungsstrebe für ein Lüfterschutzgitter
DE102015004019A1 (de) * 2015-03-26 2016-09-29 Uwe Stadtmüller Schutzgitter; Verfahren zur Herstellung eines Schutzgitters für Lüfter

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102239A (en) * 1977-02-17 1978-07-25 Dallas Charles M Washer
DE3311660C2 (fr) 1983-03-30 1990-07-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
DE29900923U1 (de) 1999-01-20 2000-07-06 ebm Werke GmbH & Co., 74673 Mulfingen Anordnung zur schwingungsisolierenden Halterung eines Elektromotors
DE10111397A1 (de) * 2001-03-09 2002-09-12 Ebm Werke Gmbh & Co Kg Schutzgitter für Ventilatoren
GB2424253A (en) * 2005-03-14 2006-09-20 L M Products Ltd Fastening system
DE102011121025A1 (de) * 2011-08-18 2013-02-21 Ziehl-Abegg Ag Motoraufhängung für Ventilatoren, vorzugsweise Axialventilatoren, sowie Verfahren zur Herstellung eines Lüftungsgitters einer solchen Motoraufhängung
DE102015004019A1 (de) * 2015-03-26 2016-09-29 Uwe Stadtmüller Schutzgitter; Verfahren zur Herstellung eines Schutzgitters für Lüfter
DE202016103323U1 (de) 2016-06-23 2016-07-06 Ebm-Papst Mulfingen Gmbh & Co. Kg Befestigungsstrebe für ein Lüfterschutzgitter

Also Published As

Publication number Publication date
EP3431772B1 (fr) 2024-02-14
DE102017116289A1 (de) 2019-01-24

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