FR2756021A1 - Automobile engine fan with simplified blade mounting - Google Patents

Automobile engine fan with simplified blade mounting Download PDF

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Publication number
FR2756021A1
FR2756021A1 FR9614072A FR9614072A FR2756021A1 FR 2756021 A1 FR2756021 A1 FR 2756021A1 FR 9614072 A FR9614072 A FR 9614072A FR 9614072 A FR9614072 A FR 9614072A FR 2756021 A1 FR2756021 A1 FR 2756021A1
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FR
France
Prior art keywords
propeller
axial direction
fan motor
characterized
motor 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
FR9614072A
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French (fr)
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FR2756021B1 (en
Inventor
Frederic Vacca
Herve Crevel
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.)
Valeo Systemes dEssuyage SAS
Original Assignee
Valeo Systemes dEssuyage SAS
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Application filed by Valeo Systemes dEssuyage SAS filed Critical Valeo Systemes dEssuyage SAS
Priority to FR9614072A priority Critical patent/FR2756021B1/en
Publication of FR2756021A1 publication Critical patent/FR2756021A1/en
Application granted granted Critical
Publication of FR2756021B1 publication Critical patent/FR2756021B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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 motor-driven fan (3) for a motor vehicle comprises a shaft assembly (6, 16) having an axial direction (8), a propeller (20) adapted to set the air in motion, and fixing means (44 , 27) of the propeller on the shaft assembly. The fixing means (44, 27) comprise snap-on fixing means in the axial direction.

Description

 The invention relates to motor fans for motor vehicles.

 We know from document FR-A-2 689 938, in the second embodiment illustrated in FIGS. 8 to 15 of this document, a fan motor comprising a motor shaft, an intermediate piece rigidly mounted on the shaft, and a propeller mounted on the intermediate piece.

The intermediate piece and the propeller have teeth on their opposite faces, these teeth being adapted to cooperate mutually to immobilize the propeller on the intermediate piece against its rotation relative to the shaft. The intermediate part and the propeller have orifices adapted to come opposite one another. The fan motor comprises a fixing element intended to be mounted against the propeller and comprising tabs extending radially in order to pass through the orifices of the propeller and of the fixing part, and to come into abutment against a rear face of this to keep the teeth in mutual engagement.

For mounting, the intermediate piece is fixed on the shaft, the propeller is mounted on the intermediate piece, the fastening element is engaged, then the propeller is turned relative to the intermediate piece to put the teeth in grip and place the intermediate piece resting against the legs. This fan motor has the disadvantage that the propeller assembly comprises a large number of steps, which makes it relatively long.

 An object of the invention is to provide a fan motor in which the mounting of the propeller is faster and simpler to perform.

 With a view to achieving this aim, a motor fan for a motor vehicle is provided according to the invention, comprising a shaft assembly having an axial direction, a propeller adapted to set air in motion, and means for fixing the propeller on the shaft assembly, in which the fastening means comprise snap fastening means in the axial direction.

 Thus, the fixing of the propeller by snap-fastening is carried out quickly and easily. The term “latching means” is understood here to mean mechanical means adapted to be freely placed in the propeller fixing position but which cannot freely leave this position after having reached it.

 Advantageously, the snap fastening means are adapted to provide a clearance in the axial direction between the shaft assembly and the propeller.

 Thus, this game further facilitates the attachment of the propeller to the shaft assembly.

 Advantageously, it includes means for urging the propeller in the axial direction.

 Thus, it takes up the axial play, which guarantees good immobilization of the propeller against its translation along the axis.

 Advantageously, the shaft assembly comprises a shaft and an intermediate piece mounted on the shaft, the propeller coming to bear in the axial direction against the intermediate piece, the intermediate piece having the latching edges.

 Thus, the shaft assembly includes two separate parts, which facilitates its manufacture. The intermediate piece can be used to ensure proper positioning of the propeller perpendicular to the shaft.

 Advantageously, the fixing means comprise a fixing piece interposed in the axial direction between the shaft assembly and the propeller, this piece being elastically compressible in the axial direction.

 Advantageously, the fixing part is metallic and has a generally frustoconical area.

 Advantageously, the shaft assembly has a first and a second section succeeding one another in the axial direction, the first section having a cross section greater than a cross section of the second section, the fixing piece bearing against the first section.

 Advantageously, the fixing means comprise lugs and edges adapted to cooperate for the snap-fastening.

 Advantageously, the lugs extend in the axial direction and are flexible elastically in a plane perpendicular to the axial direction.

 Advantageously, the biasing means comprise flexible tongues elastically in the axial direction.

 Advantageously, the propeller comprises the pins and the tongues.

 Advantageously, the fan motor comprises at least one stud, and at least one of the propeller and the shaft assembly has at least one stud receiving orifice for the transmission of the rotational movement of the assembly d propeller shaft.

 Advantageously, the stud (s) are in one piece with at least one of the propeller and the shaft assembly.

 Other characteristics and advantages of the invention will become apparent in the description which follows of two preferred embodiments given by way of nonlimiting examples. In the accompanying drawings - Figure 1 is a partial view in axial section of a fan motor according to a first embodiment of the invention; - Figure 2 is a partial view in cross section along the plane II-II of the fan in Figure 1 - Figure 3 is a view similar to Figure 1 showing a second embodiment of the invention; and - Figure 4 is a partial view in cross section along the plane IV-IV of the fan in Figure 3.

 A first embodiment of the motor-driven fan for a motor vehicle according to the invention is shown in FIGS. 1 and 2.

 The fan 2 comprises a motor 4 comprising a casing 5 and a shaft 6 of longitudinal axis 8, having a circular section. An end portion of the shaft emerges from the casing 5 and has an annular groove. This groove makes it possible to distinguish three sections 10, 12, 14 succeeding each other in the axial direction on the end part of the shaft. The first section 10 is contiguous to the end of the shaft, the second section 12 is defined by the groove and the third section 14 is adjacent to the casing 5. The first section 10 has a surface cross section greater than a surface d 'a cross section of the second section 12. The groove has a general "U" shape, the side of the groove which constitutes the transition between the first and second sections 10 and 12 and of frustoconical shape and oriented towards the outside of the throat.

 The fan motor also comprises an intermediate part 16 comprising a cylindrical hub 18 of axis 8 force-fitted on the third section 14 of the shaft 6, and a circular flat wall 21 of axis 8 extending perpendicular to the axis 8 from an outer face of the hub 18. The shaft 6 and the intermediate part 16 constitute a shaft assembly.

 The fan motor further comprises a propeller 20 comprising a hub 22 of generally planar circular shape with an axis 8 extending perpendicular to the axis 8. The propeller has blades 24 extending radially with the axis 8 from the periphery of the hub 22 beyond the casing 5.

When the propeller 20 is rotated about the axis 8, the blades 24 set the air in motion around the casing 5 parallel to the axis 8.

 The hub 22 of the propeller has a central circular recess adapted to allow the mounting of the propeller 20 on the cylindrical hub 18 of the intermediate piece 16. The hub 22 of the propeller comprises three solid cylindrical studs 26 extending with their axis parallel to axis 8, projecting from one face of the hub 22 oriented towards the intermediate part 16, in the direction of the latter. The three studs 26 are arranged at 1200 from each other around the axis 8. The wall 21 of the intermediate piece 16 has three orifices 27 having the same diameter and the same arrangement as the studs 26. The studs 26 extend in the respective ports 27 through them. These studs ensure the connection in rotation around the axis 8 of the intermediate piece 16 with the propeller 20 so that the intermediate piece driven by the shaft 6 in turn drives the propeller 20. The studs are of a standing alone with the propeller.

 The hub 22 of the propeller has reliefs 28 projecting from the face of the hub oriented towards the intermediate piece 16, these reliefs coming into contact with the facing face belonging to the flat wall 21 of the intermediate piece. Thus, the propeller 20 abuts against the intermediate part 16 against its translation along the axis 8 in the direction of the casing 5.

 The intermediate part 16 is made of metal, for example of sintered iron, and the propeller 20 is for example of plastic.

 The fan motor also comprises a metal fastening part 30 arranged in a symmetrical shape about the axis 8. This part has a main zone in the general form of a truncated cone having a wide end and a narrow end, and has an edge broad contiguous at the broad end of the truncated cone and a narrow edge contiguous at the narrow end of the truncated cone. The wide edge is flat and perpendicular to the axis 8. The narrow edge is curved in the direction of the axis 8. The fixing piece 30 is threaded on the shaft 6. The wide edge is supported on the face of the hub 22 of the propeller oriented in the opposite direction to the casing 5. The narrow edge is engaged in the groove of the second section 12 of the shaft and bears against the junction side inclined towards the outside. Thus, the fixing piece 30 bears against the first section 10. The fixing piece 30 is interposed in the axial direction between the shaft 6 and the propeller 20. The fixing piece 30 is elastically compressible in the axial direction 8 It urges the propeller 20 along the axis 8 in the direction of the intermediate piece 16. It constitutes a means of snap-fastening of the propeller 20 on the shaft assembly. This snap-fit provides a clearance in the axial direction, clearance which is taken up by the stress exerted by this fixing piece 30 on the propeller 30.

 To mount the fan, the intermediate part 16 is fixed by force on the shaft 6, then the propeller 20 is threaded on the shaft 6, the reliefs 28 abutting against the intermediate part 16 and the studs 26 entering the orifices 27 thereof. Then the fixing piece 30 is threaded onto the shaft 6. The fixing piece 30 comes into contact with the propeller 20 and the fixing piece is compressed along the axis 8 towards the propeller until the narrow edge is put resting in the groove of the shaft 6, which achieves the latching.

 We will now describe a second embodiment of the fan according to the invention with reference to Figures 3 and 4. The similar elements retain the same references.

 In the fan 3, the end part of the shaft 6 is this time limited to the third section 14 adjacent to the casing 5 and is devoid of the first and second sections.

 The intermediate part 16 has the same general shape as in the first embodiment. The flat wall 21 of this part also has three rectangular notches 40 extending radially from the periphery of this wall, in line with the respective orifices 27. The hub 22 of the propeller 20 has three studs 42 extending along the axis 8 projecting from its face oriented towards the intermediate piece 16. The studs 42 are for example rectangular in plan, and are dimensioned and arranged to pass through the notches 40 of the intermediate part 16, parallel to the axis 8. They ensure the rotation of the propeller 20, just like the studs 26 of the first mode. The studs 42 are in one piece with the propeller.

 The hub 22 of the propeller here again has a central recess, this being occupied by the hub 18 of the intermediate piece.

 The intermediate part 16 again has the three orifices 27.

 The hub 22 of the propeller also comprises three pairs of lugs 44. The lugs 44 extend parallel to the axis 8 projecting from the aforementioned face of the hub 22 of the propeller, in the direction of the intermediate part 16. The lugs 44 are arranged in pairs of two lugs extend opposite one another. These lugs are flexible elastically in a plane perpendicular to the axis 8, the lugs of each pair being flexible in the direction of one another. Each lug 44 has a semicircular end in plan and a profile shaped as a point. Each lug 44 has a general hook-shaped profile. In each pair, the hook of each lug 44 is arranged opposite the other lug. The pairs of pins are arranged so that they can penetrate into the respective holes 27 of the intermediate piece 16, and pass through them, the edges of these holes serving as support for the hooks of the pins. The passage of the end of the lugs 44 of each pair in the orifices 27 causes their bending in the direction of one another, the lugs resuming their rest position after the end has emerged from the orifice and the hook is engaged with the edge. The orifices 27 and the pins 44 cooperate to constitute snap-fastening means in the axial direction 8 of the propeller 20 to the shaft assembly. The pins 44 are dimensioned so that they provide a clearance along the axis 8 between the propeller 20 and the intermediate part 16.

 The hub 22 of the propeller has elongated rectangular tongues 48 extending radially in recesses of the same shape of the hub 22. The tongues 48 are elastically flexible along the axis 8. At rest, they project from the face of the hub 22 oriented towards the intermediate part 16, as shown in FIG. 3 in dotted lines. When the pins 44 are engaged in the orifices 27, after the snap-fastening, the tongues 48 extend in contact with the wall 21 of the intermediate piece 16 bearing on it, which they urge along the axis 8 in the direction of the casing 5. Consequently, in reaction, the intermediate part 16 and the tongues 48 urge the propeller 20 along the axis 8 in the direction opposite to the casing 5, which catches up with the aforementioned axial play.

 This embodiment does not use a fixing part, the propeller 20 being fixed to the intermediate part 16 without an additional part being required.

Claims (13)

 1. Fan motor (2; 3) for a motor vehicle, comprising a shaft assembly (6, 16) having an axial direction (8), a propeller (20) adapted to set the air in motion, and means for fixing (30; 44, 27) of the propeller on the shaft assembly, characterized in that the fixing means (30; 44, 27) comprise snap-on fixing means in the axial direction.
 2. Fan motor according to claim 1, characterized in that the snap-fastening means (30; 44, 27) are adapted to provide a clearance in the axial direction (8) between the shaft assembly (6, 16) and the propeller (20).
 3. Fan motor according to any one of claims 1 to 2, characterized in that the fixing means comprise a fixing piece (30) interposed in the axial direction (8) between the shaft assembly (6, 16) and the propeller (20), this part being elastically compressible in the axial direction.
 4. Fan motor according to claim 3, characterized in that the fixing part (30) is metallic and has an area of generally frustoconical shape.
 5. Fan motor according to one of claims 3 or 4, characterized in that the shaft assembly has first and second sections (10, 12) succeeding each other in the axial direction (8), the first section (10 ) having a cross section greater than a cross section of the second section (12), the fixing piece (30) bearing against the first section (10)
 6. Fan motor according to any one of claims 1 to 5, characterized in that the fixing means comprise lugs (44) and edges adapted to cooperate for the latching.
 7 Fan motor according to claim 6, characterized in that the lugs (44) extend in the axial direction (8) and are resiliently flexible in a plane perpendicular to the axial direction.
 8. Fan motor according to any one of claims 1 to 7, characterized in that it comprises means (30, 48) for biasing the propeller (20) in the axial direction (8).
 9. Fan motor according to claim 8, characterized in that the biasing means comprise tongues (48) resiliently flexible in the axial direction (8).
 10. Fan motor according to claims 6 and 9, characterized in that the propeller (20) comprises the lugs (44) and the tongues (48).
 11. Fan motor according to claim 6, characterized in that the shaft assembly comprises a shaft (6) and an intermediate part (16) mounted on the shaft, the propeller (20) coming to bear in the axial direction (8) against the intermediate piece, the intermediate piece (16) having the snap edges.
 12. Fan motor according to any one of claims 1 to 11, characterized in that it comprises at least one stud (26; 42), and at least one of the propeller (20) and the set of shaft (6, 16) has at least one orifice (27 40) for receiving the stud for the purpose of transmitting the rotational movement of the shaft assembly to the propeller.
 13. Fan motor according to claim 12, characterized in that the stud (s) (26; 42) are in one piece with at least one of the propeller (20) and the shaft assembly (6, 16).
FR9614072A 1996-11-19 1996-11-19 Simplified propeller mount motor Expired - Fee Related FR2756021B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9614072A FR2756021B1 (en) 1996-11-19 1996-11-19 Simplified propeller mount motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9614072A FR2756021B1 (en) 1996-11-19 1996-11-19 Simplified propeller mount motor

Publications (2)

Publication Number Publication Date
FR2756021A1 true FR2756021A1 (en) 1998-05-22
FR2756021B1 FR2756021B1 (en) 2001-11-23

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Family Applications (1)

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FR9614072A Expired - Fee Related FR2756021B1 (en) 1996-11-19 1996-11-19 Simplified propeller mount motor

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Cited By (6)

* 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
EP1085215A3 (en) * 1999-09-14 2002-05-08 Pierburg Aktiengesellschaft Electric motor driven air pump
WO2003040570A1 (en) * 2001-10-30 2003-05-15 Robert Bosch Gmbh Fan attachment with dynamic out-of-balance equalization
EP1892421A2 (en) * 2006-08-18 2008-02-27 Behr GmbH & Co. KG Axial ventilator powered by electricity
CN101858242A (en) * 2009-04-09 2010-10-13 罗伯特·博世有限公司 Engine cooling fan assembly

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH393005A (en) * 1960-11-12 1965-05-31 Electrolux Ab Holder for easily releasable attachment of a to be arranged on a shaft part, in particular a fan wheel on a motor shaft
NL6504730A (en) * 1965-04-13 1966-10-14
US3407882A (en) * 1965-11-19 1968-10-29 Brookside Corp Resilient fan hub
FR2463300A1 (en) * 1979-08-11 1981-02-20 Bosch Gmbh Robert Mounting overhung fan impeller on shaft - uses elastic centre bush fixed to centre bore of impeller and held on by spring clip
DE3206390A1 (en) * 1982-02-22 1983-09-08 Siemens Ag Releasable connection, secure against rotation and displacement, of a plastic fan rotor to a machine shaft
JPS59170492A (en) * 1983-03-18 1984-09-26 Hitachi Ltd Portable pump
EP0181549A1 (en) * 1984-11-09 1986-05-21 Siemens Aktiengesellschaft Fan wheel
EP0425040A2 (en) * 1989-10-25 1991-05-02 Whirlpool International B.V. Device for coupling a fan to its drive shaft, particularly in fan-assisted domestic electric ovens
FR2689938A1 (en) * 1992-04-11 1993-10-15 Bosch Gmbh Robert Cooling fan with fan wheel in form of cowling - fixed and locked onto a mounting disc fitted onto the drive shaft.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH393005A (en) * 1960-11-12 1965-05-31 Electrolux Ab Holder for easily releasable attachment of a to be arranged on a shaft part, in particular a fan wheel on a motor shaft
NL6504730A (en) * 1965-04-13 1966-10-14
US3407882A (en) * 1965-11-19 1968-10-29 Brookside Corp Resilient fan hub
FR2463300A1 (en) * 1979-08-11 1981-02-20 Bosch Gmbh Robert Mounting overhung fan impeller on shaft - uses elastic centre bush fixed to centre bore of impeller and held on by spring clip
DE3206390A1 (en) * 1982-02-22 1983-09-08 Siemens Ag Releasable connection, secure against rotation and displacement, of a plastic fan rotor to a machine shaft
JPS59170492A (en) * 1983-03-18 1984-09-26 Hitachi Ltd Portable pump
EP0181549A1 (en) * 1984-11-09 1986-05-21 Siemens Aktiengesellschaft Fan wheel
EP0425040A2 (en) * 1989-10-25 1991-05-02 Whirlpool International B.V. Device for coupling a fan to its drive shaft, particularly in fan-assisted domestic electric ovens
FR2689938A1 (en) * 1992-04-11 1993-10-15 Bosch Gmbh Robert Cooling fan with fan wheel in form of cowling - fixed and locked onto a mounting disc fitted onto the drive shaft.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 25 (M - 355)<1748> 2 February 1985 (1985-02-02) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1085215A3 (en) * 1999-09-14 2002-05-08 Pierburg Aktiengesellschaft Electric motor driven air pump
FR2801647A1 (en) * 1999-11-30 2001-06-01 Valeo Thermique Moteur Sa Device for fixing a fan propeller on a motor shaft
US6527516B2 (en) 1999-11-30 2003-03-04 Valeo Thermique Moteur Device for fixing a fan-blade assembly onto a motor shaft
DE10058935B4 (en) * 1999-11-30 2015-04-02 Valeo Thermique Moteur Device for fastening a fan screw to a drive shaft
FR2805573A1 (en) * 2000-02-25 2001-08-31 Ecia Equip Composants Ind Auto Fan for motor vehicle
WO2003040570A1 (en) * 2001-10-30 2003-05-15 Robert Bosch Gmbh Fan attachment with dynamic out-of-balance equalization
US6908284B2 (en) 2001-10-30 2005-06-21 Robert Bosch Gmbh Fan attachment with dynamic out-of-balance equalization
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
CN101858242A (en) * 2009-04-09 2010-10-13 罗伯特·博世有限公司 Engine cooling fan assembly
EP2243962A3 (en) * 2009-04-09 2013-05-15 Robert Bosch GmbH Engine cooling fan assembly
CN101858242B (en) * 2009-04-09 2014-11-12 罗伯特·博世有限公司 Engine cooling fan assembly

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