EP0826884A2 - Fan - Google Patents

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Publication number
EP0826884A2
EP0826884A2 EP97110004A EP97110004A EP0826884A2 EP 0826884 A2 EP0826884 A2 EP 0826884A2 EP 97110004 A EP97110004 A EP 97110004A EP 97110004 A EP97110004 A EP 97110004A EP 0826884 A2 EP0826884 A2 EP 0826884A2
Authority
EP
European Patent Office
Prior art keywords
characterized
driving element
fan
fan wheel
fan according
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
EP97110004A
Other languages
German (de)
French (fr)
Other versions
EP0826884A3 (en
EP0826884B1 (en
Inventor
Peter Bruder
Daniel Dipl.-Ing. Klumpp (Ba)
Frank Dr.-Ing. Melzer
Jens Dipl.-Ing. Ulrich
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Priority to DE19635179 priority Critical
Priority to DE1996135179 priority patent/DE19635179A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0826884A2 publication Critical patent/EP0826884A2/en
Publication of EP0826884A3 publication Critical patent/EP0826884A3/en
Application granted granted Critical
Publication of EP0826884B1 publication Critical patent/EP0826884B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/263Rotors specially for elastic fluids mounting fan or blower rotors on shafts

Abstract

The ventilator has a rotor (1), connected to a drive shaft (5) via a driver element (4). The element has at least one axial and one radial contact surface (7,8), and the rotor engages on these with similar axial and radial contact faces (23.2). The driver element has at least three radial arms (6). It is pressed onto the shaft, and connected to the rotor via a screw connection (11), which acts with a flexible material. The driver element has an anti-corrosion coating. Driver element and/or rotor have integrated positioning aids.

Description

State of the art

The invention is based on a fan in which a Fan wheel by means of a driving element with a shaft is connected, according to the features of the preamble of Claim 1.

Such a fan is known from DE 44 15 915 C1. The fan consists of a fan wheel and a fan hub, are firmly attached to the fan blades. The fan wheel is arranged on a shaft that is towards the free Shaft end has two stop shoulders. On the of that free shaft end from the second stop shoulder is one Drive plate attached. The fan wheel is with the Fan hub is loosely attached to the shaft end and is included a retaining screw in the front of the shaft is screwed in, secured. The fan wheel has between the first stop shoulder from the shaft end and the Retaining screw axial play. The fan wheel can be on the Turn the shaft so that the shaft has no torque directly transmits.

The motor torque is transferred from the shaft to the fan wheel Transfer drive disc, which is via spring or Damping elements with the fan hub in the direction of rotation connected is. The damping elements transmit that Torque and also aim that the fan wheel from Vibrations of the shaft is decoupled. The decoupling of the Fan from the vibration of the shaft, however, will only reached when the fan wheel is loose, d. H. with axial and radial play, is mounted on the shaft, otherwise over this connection the vibrations are transmitted.

If the fan wheel has an imbalance or a height or Flattened face so that the fan wheel wobbles when Runs, so this can not be sufficient by the loose fit of the fan hub on the shaft can be reduced. The The fan wheel itself becomes a high-frequency vibration exciter. Especially with larger fan wheels, where the Amplitude of the wobble from inside to outside according to the Beam set significantly enlarged and therefore large forces generated, this can lead to the fan hub deflects, the fan wheel rubs against the housing and the fan and the adjacent components are destroyed. For further the described fan has through the damping elements, which is between the driving element and the fan wheel are a very large length. The damping elements also change it at different operating temperatures Damping behavior, which means that the fan at different Operating temperatures has a different running behavior.

Advantages of the invention

According to the fan wheel is radial on the Driving element and axially through defined contact surfaces on Driving element and fixed to the fan wheel itself, creating a Wobble of the fan wheel is prevented. The fan wheel is directly connected to a larger mass and can do not become a high-frequency vibration exciter. In addition is achieved by placing the fan wheel directly on the Driving element, without intermediate elements, a short overall length reached. The running behavior remains at different Operating temperatures constant.

Because the driving element has a radial contact surface, on which the fan wheel with a radial contact surface is attached and fixed radially, have fan wheel and Driving element exactly defined positions to each other. Game that arises when, for example, both parts on the Shaft with different tolerances are stored avoided and thus also unrest in the fan movement.

Will the radial contact surface on the driving element through formed the outer periphery of the hub of the driving element, so becomes a simple, very short construction enabled with few components.

By webs between the radial contact surface of the Fan wheel and the driving element, the fan wheel is exact arranged in the center, which ensures smooth running. The webs can be on the radial contact surface of the Fan wheel or on the radial contact surface of the Take away element. Preferably three webs used because with more than three bars the position of the Fan wheel on the driving element is over-determined.

The fan wheel on the driving element is also advantageous Axially fixed contact surfaces, which are in the outermost area of the driving element. On the outer area of the Fan wheels kick the largest according to the radiation set Amplitudes of a wobble and thus the largest Powers up. Are the axial contact surfaces in the outermost area of the driving element, so is the lever arm the force acting in the outer area of the fan wheel Force absorption point small. The acting torque is reduced to a minimum. In this way, on the one hand Driving element dimensioned weaker and the Wobble can be reduced. It can also be particularly useful large fan wheels effectively absorb the greater forces will. Due to a weaker dimensioned driving element, in particular by a driving element with three arms Weight and costs can be saved. By a little Weight is the influence on the rotational movement by the Driving element reduced and it becomes less for the drive Energy needed.

By the driving element with the shaft by friction is connected in a rotationally fixed manner, for example with a clamp seat, Cone seat, shrink fit or by means of clamping elements, wedges, Flanges, etc., will be inexpensive and easy producible rotatable connection reached. A high Alignment accuracy is achieved when that Driving element in its hub, for example 3 webs has, which radially on the driving element when plugged fix the shaft and the driving element separately axially, for example on an abutment shoulder of the shaft, is fixed and non-rotatably connected.

The driving element is preferably pressed on the shaft, which is particularly inexpensive. In addition can compensate for dimensional differences by the press fit be, for example, more or less deep is pressed.

It is also advantageous to use the fan wheel To connect the driving element by frictional connection. this will basically achieved by the fan wheel on the Driving element is pressed and the result adjusting friction force prevents the parts from moving twist against each other. This can be done with, for example Latches, clamps, rivets, screws and so on can be achieved. However, are particularly advantageous Screw connections, which makes the fan wheel easy to assemble and is removable.

A so-called soft screwing is preferred applied, which prevents tolerance chains. A soft screwdriving is achieved, for example, when the Screw head only comes into contact with the plastic and only this biased noteworthy. For example, if the fan wheel is made of plastic and the screw head only comes into contact with the fan wheel and not with the Driving element, which is for example made of metal. This Effect is enhanced by using a screw which has a larger screw head in circumference and this only in the outer area with the fan wheel in system is coming. This creates a larger area of the plastic biased. It is also advantageous if the fan wheel and Driving element with small, concentric radial Contact surfaces come into contact because they are simply high Accuracy must be established.

The preload in the plastic ensures that the screw does not loosen. This effect can be done by pasting a screw lock can be increased. It is suitable for this for example a spring washer, a serrated lock washer, a Toothed lock washer, a spring lock washer, a snap lock or a locking tooth screw etc.

Has the driving element and / or the fan wheel on the circumference Pin on each of the other component in recesses are recorded, so the torque of the engine Transfer form fit if the screws loosen should. The function of the fan remains in this way guaranteed. The recesses have a slightly larger one Inner circumference than the outer circumference of the pin, so that Tolerance chains can be avoided.

At the same time, the pins become non-positive Torque transmission is used to secure the Fan function achieved with a short overall length. There is preferably a thread in the pin, whereby a positive connection by screws in the pin can be achieved.

Further contributes to a short overall length that the Screw heads either in recesses in the driving element or partially or completely submerged in the fan wheel.

There is an advantage for assembly and thus especially for the large series through stiffening bars on Fan wheel located in the area of the pegs, which in this case are located on the driving element, are interrupted. So can the fan wheel simply placed on the driving element and then correctly positioned by rotating it be so that the pins get into the recesses without that the fan wheel hooks on the stiffening webs. This can also be achieved with a ring that is on the same Scope like the pegs, but attached to the other component is so that the pins can slide on this ring before they get into the recesses.

By positioning aids in the driving element or in Fan wheel are integrated, arise especially for the Large series advantages. So in an automated process the fan wheel and the driving element after this are fixed to each other in a defined position can be set by, for example, a device in the positioning aids and the fan wheel and that Brings driving element into the defined position. Then the fan wheel with the driving element automatically connected.

Is the driving element made of a material that through the Environment, e.g. structural steel (e.g. ST 37) in a humid environment, is covered with a coating the driving element with a material that the Driving element protects from the environment, the function of the Long-term fan. This can be done, for example Metal coatings, e.g. with zinc, chrome, nickel etc., or also can be achieved by plastic coatings. Metallic Layers can be applied using immersion processes, Brewing process, contact process or galvanic process be applied. The galvanic process is special Advantageous, since it is easy to control on the one hand and other layers with this method in the desired thickness can be applied quickly.

However, the driving element can also be made of weight and Elasticity reasons made of plastic or suitable Materials e.g. corrosion protection is unnecessary make, exist.

drawing

In the drawing, an embodiment of the invention is shown. Numerous features are shown and described in connection in the description and in the claims. The person skilled in the art will expediently also consider the features individually and combine them into useful combinations.
Show it

Fig. 1
a sectional drawing of a fan,
Fig. 2
a front view of a driving element,
Fig. 3
a view of the back of a fan wheel shown reduced,
Fig. 4
a section of Figure 3 along the line IV.
Description of the embodiments

In Figure 1, a shaft 5 is shown on the one Driving element 4 is mounted with a press fit 10. The Hub 22 of the driving element 4 extends across the width of the driving element 4 in the direction of the free shaft end and in the opposite direction. This allows on Driving element 4 occurring torques better absorbed will. The driving element 4 has an axial Projection, which at the same time has a radial contact surface 8 represents. On the radial contact surface 8 is a fan wheel 1 with a radial contact surface 2, on which Fan blades 3 are firmly attached. On the radial Contact surface 2 is preferably three webs 9, with which the fan wheel 1 on the driving element 4 in radial Direction is fixed exactly.

The fan wheel 1 is axially defined by annular Contact surfaces 7, 23 on the driving element 4 and on the fan wheel 1 fixed yourself. The contact surfaces 7, 23 are in the outer area of the driving element 4.

The driving element 4 and the fan wheel 1 are with a Screw connection 11 non-positively connected to one another. Screws 16 are preferably located in the center of the Contact surfaces 7, 23, which ensures a uniform Surface pressure is reached. Are on the driving element 4 Pin 13 mounted in the middle of the contact surfaces 7, 23. The Pins 13 are through cutouts 14 in the fan wheel 1 recorded a slightly larger scope than that Have pin 13, which prevents a tolerance chain becomes. This will center the fan clearly the driving element 4 guaranteed by the webs 9. In the Pins are holes 24 in the screws 16 of the fan side are screwed in, expediently a thread 15 is generated when screwing in. The pins 13 are shorter than the fan wheel 1 is wide, so that Screw heads 17 only come into contact with fan wheel 1. A so-called soft screwing case 12 is thus achieved, by only the fan wheel 1, which is made of plastic, a significant preload due to the tightening torque of the Screws 16 experiences. The screws 16 are through Screw locks 21, for example with a toothed lock washer or by using locking toothed screw 16 against loosen secured.

Positioning aids 18 are located on the driving element 4 appropriate. These can be in the middle, for example Direction of the contact surfaces 7 and the pin 13 are. The Fan wheel 1 has a recess in the middle, so that the Positioning aids 18 still controlled from the fan side can be, even if the fan wheel 1 on the Driving element 4 sits. The driving element 4 and the fan wheel 1 after being fixed to each other are, by a positioning device, for example consists of pins which in the positioning aids 18, for example grooves, engages in a defined position be twisted. Then in the defined position then in an automated process positive connection between the driving element 4 and the Fan wheel 1 produces, for example by a screwdriver.

The fan wheel 1 faces the driving element Stiffening webs 19 in the region of the pin 13 are interrupted 20, so that when turning the fan wheel 1 on the driving element 4, the pin 13 not to the Stiffening webs 19 get stuck.

Claims (14)

  1. Fan with a fan wheel (1), which by means of a Driving element (4) with a drive shaft (5) rotatably is connected, characterized in that the with the Drive shaft (5) rotationally connected driving element (4) at least one axial and at least one radial Has contact surface (7, 8) on which the fan wheel (1) with at least one axial and radial contact surface (23, 2) is present.
  2. Fan according to claim 1, characterized in that the Driving element (4) at least three are radial Direction extending arms (6).
  3. Fan according to claim 1, characterized in that the Driving element (4) a radial contact surface (8) has on which the fan wheel (1) with a radial Contact surface (2) is attached and fixed radially.
  4. Fan according to claim 3, characterized in that the radial contact surface (2) of the fan wheel (1) or radial contact surface (8) of the driving element (4) has at least three webs (9).
  5. Fan according to one of the preceding claims, characterized characterized in that the contact surfaces (7) in the radial outer area of the entrainment element (4).
  6. Fan according to one of the preceding claims, characterized characterized in that the driving element (4) on the shaft (1) is pressed on.
  7. Fan according to one of the preceding claims, characterized characterized in that the driving element (4) by means of a Screw connection (11) connected to the fan wheel (1) is.
  8. Fan according to claim 7, characterized in that the Screw connection (11) with at least one flexible Material interacts.
  9. Fan according to one of the preceding claims, characterized characterized in that the driving element (4) or the Fan wheel (1) has pins (13) which are in recesses (14) of the other component.
  10. Fan according to claim 9, characterized in that the Pin (13) with loose screw connection (11) one create a positive connection.
  11. Fan according to claim 10, characterized in that Bores (24) in the pin (13) are in the one screw (16) with thread (15) engages.
  12. Fan according to claim 9 or one of the following Claims, characterized in that the fan wheel (1) Stiffening webs (19) which in the area of Pins (13) are interrupted (20).
  13. Fan according to one of the preceding claims, characterized characterized in that in the driving element (4) and / or in Fan wheel (1) positioning aids (18) are integrated.
  14. Fan according to one of the preceding claims, characterized characterized in that on the driving element (4) Coating against corrosion is applied.
EP19970110004 1996-08-30 1997-06-19 Fan Expired - Lifetime EP0826884B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19635179 1996-08-30
DE1996135179 DE19635179A1 (en) 1996-08-30 1996-08-30 Fan

Publications (3)

Publication Number Publication Date
EP0826884A2 true EP0826884A2 (en) 1998-03-04
EP0826884A3 EP0826884A3 (en) 1998-11-04
EP0826884B1 EP0826884B1 (en) 2003-09-03

Family

ID=7804173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970110004 Expired - Lifetime EP0826884B1 (en) 1996-08-30 1997-06-19 Fan

Country Status (3)

Country Link
EP (1) EP0826884B1 (en)
DE (1) DE19635179A1 (en)
ES (1) ES2206631T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801647A1 (en) * 1999-11-30 2001-06-01 Valeo Thermique Moteur Sa Device for fixing a fan propeller on a motor shaft
FR2805573A1 (en) * 2000-02-25 2001-08-31 Ecia Equip Composants Ind Auto Fan for motor vehicle
WO2001071196A1 (en) * 2000-03-18 2001-09-27 Robert Bosch Gmbh Device for fixing a subassembly to an essentially smooth driveshaft
DE10136729A1 (en) * 2001-07-27 2003-02-13 Behr Gmbh & Co Ventilator with rotor positioned and fixed positively on driver element via contact faces formed by snap connections on rotor
EP1892421A2 (en) * 2006-08-18 2008-02-27 Behr GmbH & Co. KG Axial ventilator powered by electricity

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885888A (en) * 1973-03-26 1975-05-27 John G Warhol Cooling fan for radiators and the like
DE3339075A1 (en) * 1983-10-28 1985-05-09 Stiebel Eltron Gmbh & Co Kg Mounting of a fan impeller on a motor shaft
DE9205097U1 (en) * 1992-04-11 1993-08-05 Robert Bosch Gmbh, 70469 Stuttgart, De
DE4415915C1 (en) * 1994-05-05 1995-06-22 Siemens Ag Ventilator fan mounted on rotor shaft of electrical machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885888A (en) * 1973-03-26 1975-05-27 John G Warhol Cooling fan for radiators and the like
DE3339075A1 (en) * 1983-10-28 1985-05-09 Stiebel Eltron Gmbh & Co Kg Mounting of a fan impeller on a motor shaft
DE9205097U1 (en) * 1992-04-11 1993-08-05 Robert Bosch Gmbh, 70469 Stuttgart, De
DE4415915C1 (en) * 1994-05-05 1995-06-22 Siemens Ag Ventilator fan mounted on rotor shaft of electrical machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801647A1 (en) * 1999-11-30 2001-06-01 Valeo Thermique Moteur Sa Device for fixing a fan propeller on a motor shaft
DE10058935B4 (en) * 1999-11-30 2015-04-02 Valeo Thermique Moteur Device for fastening a fan screw to a drive shaft
US6527516B2 (en) 1999-11-30 2003-03-04 Valeo Thermique Moteur Device for fixing a fan-blade assembly onto a motor shaft
FR2805573A1 (en) * 2000-02-25 2001-08-31 Ecia Equip Composants Ind Auto Fan for motor vehicle
DE10109299B4 (en) * 2000-02-25 2005-09-01 Faurecia Bloc Avant Fan for motor vehicles
WO2001071196A1 (en) * 2000-03-18 2001-09-27 Robert Bosch Gmbh Device for fixing a subassembly to an essentially smooth driveshaft
DE10136729A1 (en) * 2001-07-27 2003-02-13 Behr Gmbh & Co Ventilator with rotor positioned and fixed positively on driver element via contact faces formed by snap connections on rotor
EP1892421A2 (en) * 2006-08-18 2008-02-27 Behr GmbH & Co. KG Axial ventilator powered by electricity
EP1892421A3 (en) * 2006-08-18 2008-03-26 Behr GmbH & Co. KG Axial ventilator powered by electricity

Also Published As

Publication number Publication date
EP0826884A3 (en) 1998-11-04
EP0826884B1 (en) 2003-09-03
DE19635179A1 (en) 1998-03-05
ES2206631T3 (en) 2004-05-16

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