EP2727222A1 - Permanente schraubenfixierung - Google Patents

Permanente schraubenfixierung

Info

Publication number
EP2727222A1
EP2727222A1 EP12730424.4A EP12730424A EP2727222A1 EP 2727222 A1 EP2727222 A1 EP 2727222A1 EP 12730424 A EP12730424 A EP 12730424A EP 2727222 A1 EP2727222 A1 EP 2727222A1
Authority
EP
European Patent Office
Prior art keywords
screw
motor base
discontinuity
bore
tool
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.)
Withdrawn
Application number
EP12730424.4A
Other languages
English (en)
French (fr)
Inventor
Pierre Blanchet
Stéphane PICHARD
Alain Servin
Thierry Delage
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
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 Valeo Systemes dEssuyage SAS filed Critical Valeo Systemes dEssuyage SAS
Publication of EP2727222A1 publication Critical patent/EP2727222A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/025—Locking of screws, bolts or nuts in which the locking takes place after screwing down by plastic deformation of a part of one of the threaded elements into a notch or cavity of the other threaded element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/08—Sliding-contact bearings for exclusively rotary movement for axial load only for supporting the end face of a shaft or other member, e.g. footstep bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/081—Structural association with bearings specially adapted for worm gear drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/09—Windscreen wipers, e.g. pivots therefore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
    • F16C2380/27—Motor coupled with a gear, e.g. worm gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/03—Machines characterised by thrust bearings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49947—Assembling or joining by applying separate fastener
    • Y10T29/49963—Threaded fastener

Definitions

  • the invention relates to a method and a system for permanently fixing a screw for compensating the axial clearance of the armature shaft of a wiper motor of a motor vehicle.
  • the armature shaft In wiper motors of a motor vehicle, the armature shaft must be locked axially, relative to the motor base. This blocking is usually carried out by a screw screwed axially into a bore, provided with a tapping, of the motor base, to a position of abutment vis-à-vis the armature shaft.
  • the screwing of the screw and its positioning in abutment are performed by means of a screwdriver controlled according to the consumption current of the vacuum motor.
  • the current technique is to inject in the vicinity of the screw in the abutment position a fixing resin, to perform the blocking.
  • the object of the present invention is to overcome the above-mentioned drawbacks by implementing a method and a system for permanently fixing a screw for compensating the axial clearance of the armature shaft of a motor. wipers, in which the injection of a fixing resin is suppressed.
  • another object of the present invention is the implementation of a method and a system for permanently fixing a screw for compensating the axial clearance of the armature shaft of a wiper motor.
  • the permanent fixing is obtained by a purely mechanical operation of short duration, replacing the resin injection operation and the setting phase or hardening of the resin, expensive in manufacturing process time.
  • the method of permanently fixing a screw for compensating the axial clearance of the armature shaft of a windscreen wiper motor, the compensation screw being screwed axially into a bore of the motor base, to a position abutment vis-à-vis the armature shaft locked thereon, object of the invention is remarkable in that it consists at least to spare in the bore and / or the thread of the screw at least one surface discontinuity for screwing the screw into the bore to the stop position, screwing the screw in the bore to the stop position, and applying at the discontinuity a deformation force of the screw and / or the motor base to deform the lateral surface of the screw and / or the motor base and perform permanent fixing of the screw and / or the motor base by jamming in the discontinuity.
  • the method which is the subject of the invention is furthermore remarkable in that the discontinuity is a slot or a recess provided on the lateral surface of the motor base or the screw.
  • the method which is the subject of the invention is also remarkable in that the operation of applying a deformation force consists in axially applying, to the screw / bore assembly of the motor base, a punch-type tool comprising at least one lateral rib for deforming the screw and / or bore by stamping in the corresponding discontinuity.
  • the method of the invention is also remarkable in that the punch-type tool is mounted on a machine tool of a production line.
  • the method which is the subject of the invention is remarkable in that the punch-type tool is of substantially circular cross-section, the tool being provided with an end tip and having a rib formed along its length. a generatrix of the substantially circular section, the rib continuing on the end tip.
  • the method which is the subject of the invention is remarkable in that the punch-type tool is of substantially circular section, the tool being provided with a circular housing at its working end, the circular housing. having a rib.
  • the method which is the subject of the invention is remarkable in that said discontinuity is constituted by a slot or a recess formed in the lateral surface of the motor base at the bore, the discontinuity being executed during the molding of the motor base.
  • the system for permanently fixing a screw for compensating the axial clearance of the armature shaft of a windscreen wiper motor, the compensation screw being screwed axially into a bore of the motor base, to a position abutment with respect to the armature shaft locked thereon, object of the invention, is remarkable in that it comprises at least one surface discontinuity formed in the bore and / or the threading the screw, and a deformation of the screw and / or the base forming a permanent attachment of the screw and / or the motor base by jamming in the discontinuity.
  • the permanent fastening system which is the subject of the invention, is furthermore remarkable in that the discontinuity is a slot or a recess provided on the lateral surface of the base or the screw.
  • the permanent fastening system object of the invention, is also remarkable in that the deformation is formed by a stamping of the screw and / or the motor base in the discontinuity.
  • the permanent fastening system, object of the invention is according to another embodiment, remarkable in that the screw is a hollow screw.
  • This screw is for example made of plastic material.
  • the permanent fastening system object of the invention, is according to another variant, remarkable in that the motor base is made of Zamac or aluminum alloy.
  • the permanent fastening system, subject of the invention is according to another variant, remarkable in that the discontinuity is constituted by a slot of the order of 5 to 8 millimeters aperture.
  • the invention furthermore covers a wiper motor comprising an armature shaft locked on a screw for compensating the axial clearance of the armature shaft screwed into a bore of the motor base to a stop position, remarkable in that the compensation screw and / or the bore of the motor base comprises at least one deformation constituting a fastening system permanent as mentioned above.
  • the method and the system for permanently fixing a screw for compensating the axial clearance of the armature shaft of a windscreen wiper motor which are the subject of the invention, find application in the industrial manufacture of current motors. continuous operation, including wiper motors, in the automotive industry.
  • FIGS. 1 to 1c illustrate the steps of implementing the method of permanently fixing a screw for compensating the axial clearance of the armature shaft of a windscreen wiper motor, object of the invention, in a nonlimiting preferred embodiment
  • Figures 2a and 2b show a perspective view of a punch-type tool, allowing the implementation of the method of the invention, as shown in Figures 1 to 1c and in a non-limiting variant respectively;
  • FIGS. 3a and 3b show a sectional view along a longitudinal plane of symmetry of a windscreen wiper motor equipped with a system for permanently fixing the axle end compensation screw of the armature shaft thereof. motor, according to the implementation mode according to the method illustrated in Figures 1 to 1c and in the non-limiting variant above.
  • FIG. 1a shows the motor base SM of a windscreen wiper motor comprising a bore 1, provided with a tapping, the latter being intended to receive a screw for compensating the axial clearance of the shaft.
  • armature motor windshield wiper. It is understood, in fact, that the compensation screw being screwed axially in the bore 1 of the motor base SM, to a stop position vis-à-vis the armature shaft blocked on the screw, the latter allows to prevent the axial play of the aforementioned armature shaft.
  • the previously mentioned screw is a hollow screw.
  • the method of the invention consists in providing in the bore 1 at least one surface discontinuity 2 allowing however the screwing of the screw in the bore until at the stop position.
  • the aforementioned discontinuity 2 is advantageously constituted by a slot or a recess formed in the lateral surface of the motor base SM at the level of the bore 1.
  • the discontinuity 2 can be executed during the molding of the motor base for example.
  • the discontinuity 2 may for example be constituted by a slot of the order of 5 to 8 millimeters aperture.
  • the method of the invention in the preferred embodiment mentioned above, is to screw the screw 3 in the bore to the stop position. This operation is shown in Figure 1b supra, when the compensation screw 3 has been screwed and is placed in a bore 1 of the motor base SM.
  • the method which is the subject of the invention then consists, as shown in FIG. 1b, of applying at the level of the discontinuity 2 a deformation effort of the screw 3 in order to deform the lateral surface of the latter and thus to carry out a permanent fixing of the compensation screw 3, by jamming in the discontinuity 2.
  • the application operation of the deformation force consists for example of applying axially to the screw / bore assembly of the base SM motor a punch-type tool, comprising at least one lateral rib for deforming the compensation screw 3 by stamping in the discontinuity 2 above.
  • the compensation screw 3 provided with its deformation stamped in the surface discontinuity 2 of the bore 1 is shown in FIG. 1c.
  • the screw used being, in this situation, provided with a corresponding recess allowing the screwing of the latter in the bore 1.
  • the screw is then screwed into the bore 1 to the stop position.
  • the creation of a discontinuity 2 in the side surface of the motor base SM and the bore 1 is then not essential.
  • the strain of strain D of the motor base SM and of the bore 1 is then applied at the level of the discontinuity of the screw to deform the lateral surface of the said motor base and the bore 1 and thus perform a permanent fixing of the compensation screw 3 to the motor base SM at the discontinuity 2 of the screw 3.
  • the mode of implementation of the method which is the subject of the invention as illustrated in FIG. 1a to 1c is preferred because, firstly, the motor base can be mounted on a production line with its apparent discontinuity 2 and easily accessible, the punch-type tool then being simply applied at the screw 3, while, secondly, the deformation force D to be exerted on the compensation screw 3 to perform the stamping of this last in the discontinuity 2 of the motor base SM is relatively reduced.
  • the compensation screw 3 may be a screw made of plastic material.
  • the implementation mode according to the variant indicated above involves monitoring the position of the slot or discontinuity 2 formed on the side wall of the screw 3 to apply a deformation force D at the detected discontinuity 2.
  • the deformation force D to be applied then on the edge of the bore 1 to the right of the slot or discontinuity 2 detected can then be greater.
  • FIG. 2a shows the punch-type tool for implementing the method that is the subject of the invention in its preferred mode of implementation.
  • a tool is advantageously mounted on a machine tool of a production line.
  • substantially circular section it is provided with an end tip 41 and comprises a rib 42, formed along a generatrix of the substantially circular section. This rib continues on the tip end, along a generating line of the cone constituting the aforementioned tip.
  • the aforementioned punch-shaped tool is a special steel tool used for making machine tool tools.
  • the punch-type tool for implementing the method that is the subject of the invention according to the embodiment variant described above, when the deformation force D is applied to the outer wall is represented.
  • This tool can advantageously also be mounted on a machine tool of a production line.
  • Section also substantially circular, it is however provided with a substantially circular housing 43 at its working end.
  • the circular housing 43 is also provided with a rib 42 playing substantially the same role as the rib 42 shown and described relative to the tool shown in Figure 2a.
  • the rib 42 makes it possible to emboss the wall of the motor base SM in the vicinity of the bore 1 and thus carries out a local stamping of the wall of the motor base in the discontinuity 2 of the screw.
  • This variant of implementation can be executed when the motor base SM is made of Zamac or aluminum alloy.
  • references designate the same elements as previously in the description.
  • reference 5 designates a self-lubricating ring for the rotation of the armature bearing the reference 6.
  • FIG. 3a it can be seen that the surface discontinuity 2 appears at the level of the motor base SM, that is to say at the level of the side wall of the bore 1, and that the deformation d appears on the surface of the the compensation screw 3.
  • the windscreen wiper motor shown in FIGS. 3a and 3b comprises a deformation d provided at either the compensation screw 3 or the bore 1, and thus constitutes a permanent fixing system such that previously described.
EP12730424.4A 2011-06-28 2012-06-11 Permanente schraubenfixierung Withdrawn EP2727222A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1155750A FR2977283B1 (fr) 2011-06-28 2011-06-28 Fixation permanente vis
PCT/EP2012/060959 WO2013000685A1 (fr) 2011-06-28 2012-06-11 Fixation permanente vis

Publications (1)

Publication Number Publication Date
EP2727222A1 true EP2727222A1 (de) 2014-05-07

Family

ID=46397175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12730424.4A Withdrawn EP2727222A1 (de) 2011-06-28 2012-06-11 Permanente schraubenfixierung

Country Status (7)

Country Link
US (2) US20140227059A1 (de)
EP (1) EP2727222A1 (de)
JP (1) JP6081455B2 (de)
CN (1) CN103765733B (de)
FR (1) FR2977283B1 (de)
MX (1) MX354318B (de)
WO (1) WO2013000685A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107461482B (zh) * 2016-06-02 2021-03-19 广东肇庆爱龙威机电有限公司 齿轮箱总成以及包括该齿轮箱总成的头枕驱动器

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Also Published As

Publication number Publication date
JP2014520695A (ja) 2014-08-25
FR2977283B1 (fr) 2013-08-30
MX354318B (es) 2018-02-26
MX2014000099A (es) 2014-05-28
CN103765733A (zh) 2014-04-30
JP6081455B2 (ja) 2017-02-15
US20140227059A1 (en) 2014-08-14
FR2977283A1 (fr) 2013-01-04
WO2013000685A1 (fr) 2013-01-03
US20170284450A1 (en) 2017-10-05
CN103765733B (zh) 2016-08-17

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