Motor vehicle window lifter

Abstract

A motor vehicle window lifter with a twistable or bendable guide rail 3 on which a driver to be coupled with a window pane is shiftably mounted and which includes fastening points 51 with are connectable with fastening receptacles 41 of a carrier element 2 . Between the fastening receptacles 41 of the carrier element 2 at least one supporting point 61 is provided. When bracing the fastening points 51 of the guide rail 3 with the fastening receptacles 41 of the carrier element 2 , the guide rail 3 supports on the supporting point 61 and twisting of the initially straight guide rail 3 with a specified degree of twisting and/or bending of the guide rail 3 with a specified bending radius R is effected.

1 . A motor vehicle window lifter with a twistable or bendable guide rail on which a driver to be coupled with a window pane is shiftably mounted and which includes fastening points which are connectable with fastening receptacles of a carrier element, wherein a twist of the initially straight guide rail with a specified degree of twisting and/or a bend of the guide rail with a specified bending radius is effected by bracing the fastening points of the guide rail with the fastening receptacles of the carrier element,
 characterized by   at least one supporting point ( 42 ,  43 ,  61 - 63 ) between the fastening receptacles ( 41 - 48 ) of the carrier element ( 2 ), on which the guide rail ( 3 ) supports on bracing the guide rail ( 3 ) with the carrier element ( 2 ).   
     
     
         2 . The window lifter according to  claim 1 , characterized in that the at least one supporting point ( 41 ,  42 ,  43 ,  61 - 63 ) is shaping for the curvature or twist of the guide rail ( 3 ). 
     
     
         3 . The window lifter according to  claim 1  or  2 , characterized in that a substantially straight guide rail ( 3 ) is bent when bracing the guide rail ( 3 ) with the carrier element ( 2 ) by supporting the guide rail ( 3 ) on the supporting point ( 61 ) and attaching the same to fastening receptacles ( 41 ) of the carrier element ( 2 ). 
     
     
         4 . The window lifter according to  claim 1  or  2 , characterized in that a guide rail ( 3 ′) pre-bent with a first bending radius (R 1 ) is bent up to a second bending radius (R 2 ), which is greater than the first bending radius (R 1 ), or straightened by supporting and/or attaching the guide rail ( 3 ′) at the supporting point ( 42 ) and fastening the same to the fastening receptacles ( 41 ) of the carrier element ( 2 ). 
     
     
         5 . The window lifter according to  claim 1  or  2 , characterized in that between the fastening points ( 51 ) arranged at the end regions of the guide rail ( 3 ) at least one further fastening and/or supporting point ( 52 ) is provided, between which and the fastening points ( 51 ) arranged in the end regions of the guide rail ( 3 ) at least one supporting point ( 62 ) each is arranged. 
     
     
         6 . The window lifter according to  claim 5 , characterized in that the fastening points ( 51 ,  52 ) and the supporting points ( 61 ,  62 ) are arranged and/or formed such that when bracing the guide rail ( 3 ) with the carrier element ( 2 ) different twists and/or bending radii are obtained along the guide rail, in particular between the fastening points ( 51 ,  52 ). 
     
     
         7 . The window lifter according to at least one of the preceding claims, characterized in that at least one supporting point ( 42 ,  43 ,  61 - 63 ) is formed as additional fastening point ( 51 - 58 ). 
     
     
         8 . The window lifter according to at least one of the preceding claims, characterized in that at least one fastening receptacle ( 41 ) is provided at the body ( 1 ;  1   b ) of a motor vehicle door as carrier element ( 2 ) and at least one fastening receptacle ( 41 ;  44 ,  45 ) is provided on a carrier plate to be connected with the door body ( 1 ;  1   b ) or on a function carrier as carrier element ( 2 ) and that the fastening receptacles ( 41 ;  44 ,  45 ) correspond with fastening points ( 51 ;  54 - 56 ) of the guide rail ( 3 ). 
     
     
         9 . The window lifter according to  claim 8 , characterized in that the guide rail ( 3 ) is pre-positionable by means of a hook-shaped fastening receptacle ( 44 ) formed on the carrier element ( 2 ), which can be put through a fastening point of the guide rail ( 3 ) formed as opening ( 54 ). 
     
     
         10 . The window lifter according to  claim 8  or  9 , characterized by a first bending radius (R 1 ) of the guide rail ( 3 ) premounted on the carrier element ( 2 ) and a second bending radius (R 2 ) during assembly of the carrier element ( 2 ) with the guide rail ( 3 ) pre-mounted on the carrier element ( 2 ) into the door body ( 1 ;  1   b ). 
     
     
         11 . The window lifter according to at least one of the preceding claims, characterized in that the fastening receptacles ( 46 ) of the carrier element ( 2 ) consist of slotted box sections into which the fastening points ( 57 ) of the guide rail ( 3 ) can be put, wherein the fastening points ( 57 ) of the guide rail ( 3 ) consist of webs angled from the guide rail ( 3 ), and that supporting webs and/or supporting sections ( 21 ,  22 ;  63 ) protruding from the surface of the carrier element ( 2 ) engage in supporting webs and/or supporting sections ( 32 ) protruding from the guide rail ( 3 ). 
     
     
         12 . The window lifter according to at least one of the preceding  claims 1  to  10 , characterized in that the fastening receptacles of the carrier element ( 2 ) consist of a carrier element hook ( 48 ,  48 ′) protruding from the surface of the carrier element ( 2 ) and a clip ( 47 ) and the fastening points of the guide rail ( 3 ) consist of a guide rail hook ( 58 ,  58 ′), which engages behind the carrier element hook ( 48 ,  48 ′), and a clip protrusion ( 57 ) cooperating with the clip ( 47 ) of the carrier element ( 2 ), which are formed such that after putting the guide rail hook ( 58 ,  58 ′) into the carrier element hook ( 48 ,  48 ′) the guide rail ( 3 ) can be pivoted about the positive connection of the guide rail hook ( 58 ,  58 ′) and carrier element hook ( 48 ,  48 ′), until the clip protrusion ( 57 ) of the guide rail ( 3 ) snaps into the clip ( 47 ) of the carrier element ( 2 ). 
     
     
         13 . The window lifter according to  claim 12 , characterized in that the surface of the carrier element ( 2 ) facing the guide rail ( 3 ) includes a cutout ( 48 ′) in the plug-in opening of the carrier element hook for accommodating an elongated guide rail hook ( 58 ′). 
     
     
         14 . The window lifter according to at least one of the preceding claims, characterized in that at least one fastening receptacle of the carrier element ( 2 ) and a fastening point of the guide rail ( 3 ) and/or at least one supporting point of the carrier element ( 2 ) is/are formed as adhesive connection ( 7 ) between the surfaces of the carrier element ( 2 ) and the guide rail ( 3 ). 
     
     
         15 . The window lifter according to  claim 14 , characterized by at least one spacer ( 24 ,  26 ,  32 ) arranged between the surfaces of the carrier element ( 2 ) to be connected with each other by the adhesive connection ( 7 ) and the guide rail ( 3 ), which protrudes from the surface of the carrier element ( 2 ) and/or the guide rail ( 3 ). 
     
     
         16 . The window lifter according to  claim 14  or  15 , characterized in that laterally of the surfaces of the carrier element ( 2 ) to be connected by the adhesive connection ( 7 ) and the guide rail ( 3 ) depressions ( 23 ) and/or at least one opening ( 20 ) in the carrier element ( 2 ) is arranged in the region of the surfaces of the carrier element ( 2 ) to be connected by the adhesive connection ( 7 ) and of the guide rail ( 3 ), into or through which excess, non-cured adhesive can flow off. 
     
     
         17 . The window lifter according to at least one of the preceding  claims 14  to  16 , characterized in that the surface ( 29 ) of the carrier element ( 2 ) is structured by alternating elevations and depressions, wherein between the surface of the guide rail ( 3 ) and the elevations and depressions of the surface ( 29 ) of the carrier element ( 2 ) alternating spaces are formed for taking up adhesive. 
     
     
         18 . The window lifter according to at least one of the preceding claims, characterized in that at least one fastening receptacle of the carrier element ( 2 ) is formed as clip connection ( 47 ,  48 ) into which the lateral edges of the guide rail ( 3 ) can be clipped. 
     
     
         19 . The window lifter according to at least one of the preceding claims, characterized in that the guide rail ( 3 ) is made of an extruded plastic material permeable for laser radiation ( 13 ) and the carrier element ( 2 ) is made of a material absorbing laser radiation ( 13 ), that the guide rail ( 3 ) is pre-bent and fixing elements ( 47 ,  48 ) protrude from the surface of the carrier element ( 2 ), which engage behind the edges of the pre-bent guide rail ( 3 ) such that a part of the surface ( 300 ) of the guide rail ( 3 ) is brought in contact with a part ( 27 ) of the surface of the carrier element ( 2 ), and that the adjacent surface portions ( 27 ,  300 ) of the guide rail ( 3 ) and of the carrier element ( 2 ) are connectable with each other by laser welding. 
     
     
         20 . The window lifter according to at least one of the preceding  claims 1  to  18 , characterized in that the guide rail ( 3 ) is made of a material absorbing laser radiation ( 13 ) and the carrier element ( 2 ) is made of a plastic material permeable for laser radiation ( 13 ), that the guide rail ( 3 ) is pre-bent and fixing elements ( 47 ,  48 ) protrude from the surface of the carrier element ( 2 ), which engage behind the edges of the pre-bent guide rail ( 3 ) such that a part of the surface ( 300 ) of the guide rail ( 3 ) is brought in contact with a part ( 27 ) of the surface of the carrier element ( 2 ), and that the adjacent surface portions ( 27 ,  300 ) of the guide rail ( 3 ) and of the carrier element ( 2 ) are connectable with each other by laser welding. 
     
     
         21 . The window lifter according to at least one of the preceding claims, characterized in that at least one fastening point of the guide rail ( 3 ) is formed as clip ( 77 ) which can be clipped into a fastening receptacle of the carrier element ( 2 ) formed as opening ( 20 ) in the carrier element ( 2 ). 
     
     
         22 . The window lifter according to at least one of the preceding claims, characterized by a hook- or pocket-shaped stop ( 74 ,  74 ′) on the surface of the carrier element ( 2 ) for accommodating an end of the guide rail ( 3 ) and a mounting aid ( 75 ,  76 ) protruding from the surface of the carrier element ( 2 ) for aligning the guide rail ( 3 ) put into the hook- or pocket-shaped stop ( 74 ,  74 ′) on the surface of the carrier element ( 2 ). 
     
     
         23 . The window lifter according to at least one of the preceding claims, characterized in that the carrier element ( 2 ) includes a rectangular or trapezoidal depression ( 25 ) with legs ( 28 ) horizontally angled from the edge of the depression ( 25 ), to which a rectangular or trapezoidal depression ( 34 ) of the guide rail ( 3 ) is adapted, which with its side legs ( 35 ) horizontally angled from the edge of the depression ( 34 ) rests on the legs ( 28 ) of the carrier element ( 2 ) angled from the rectangular or trapezoidal depression ( 25 ) and that the bottom of the rectangular or trapezoidal depressions ( 25 ,  34 ) of the carrier element ( 2 ) and of the guide rail ( 3 ) are connected with each other via at least one rivet ( 78 ) or at least one screw ( 79 ). 
     
     
         24 . The window lifter according to  claim 23 , characterized in that from the bottom of the rectangular or trapezoidal depression ( 25 ) of the carrier element ( 2 ) a dome-like protuberance ( 200 ) protrudes for accommodating the thread of the screw ( 79 ). 
     
     
         25 . The window lifter according to at least one of the preceding claims, characterized in that the guide rail ( 3 ) is formed as extruded plastic rail with an extruded fleece, fabric, paper or film ( 31 ) inserted in a sandwich construction or with a metallic insert ( 32 ). 
     
     
         26 . The window lifter according to at least one of the preceding claims, characterized in that a cable pulley holder or a cassette ( 15 ) accommodating a cable pulley ( 14 ) deflecting a window lifter cable ( 12 ) is integrated into the connection of the guide rail ( 3 ) with the carrier element ( 2 ). 
     
     
         27 . The window lifter according to  claim 26 , characterized in that the cassette ( 15 ) includes two bearing surfaces ( 151 ,  152 ) forming a rear grip of the cassette ( 15 ) on the guide rail ( 3 ), via which the cassette ( 15 ) is connected with the guide rail ( 3 ), that through a cutout ( 36 ) in the guide rail ( 3 ) the cassette ( 15 ) is connected with the cable pulley ( 14 ) and a stepped pin with internal thread ( 16 ,  17 ), on which the cable pulley ( 14 ) is mounted, and that a screw ( 19 ) put through an opening ( 20 ) of the carrier element ( 2 ) or the door body ( 1   b ) is screwed to the internal thread of the stepped pin ( 16 - 18 ). 
     
     
         28 . The window lifter according to  claim 27 , characterized in that the cassette ( 15 ) is supported on the carrier element ( 2 ) or the door body ( 1   b ) via the bearing surfaces ( 151 ,  152 ). 
     
     
         29 . The window lifter according to  claim 28 , characterized in that the bottom ( 170 ) of the stepped pin with internal thread ( 17 ) rests against the carrier element ( 2 ) or the door body ( 1   b ). 
     
     
         30 . The window lifter according to  claim 27 , characterized in that the supporting surfaces ( 151 ,  152 ) are spaced from the carrier element ( 2 ) and that the bottom ( 180 ) of the stepped pin with internal thread ( 18 ) rests against the carrier element ( 2 ). 
     
     
         31 . A vehicle window lifter with a base plate ( 8 ), into which at least one bendable and/or twistable guide rail ( 3 ) for guiding a driver ( 11 ) to be coupled with a window pane ( 13 ) along an adjustment direction is integrated and which includes fastening points ( 5 ,  5 ′) which are connectable with fastening receptacles ( 4 ) of a vehicle door ( 1 ), wherein a twist and/or bend of the at least one guide rail ( 3 ) is effected by supporting on at least one supporting point ( 6 ) between the fastening receptacles ( 4 ) of the carrier element ( 2 ), when the carrier element ( 2 ) is attached to the door body ( 1   a ,  1   b ) and is braced thereby. 
     
     
         32 . The window lifter according to  claim 31 , characterized in that the supporting points ( 6 ) of the carrier element ( 2 ) consist of parts of the door inner panel ( 1   b ), a side impact carrier ( 1   g ) and/or of other structure-forming elements. 
     
     
         33 . A vehicle window lifter with a base plate into which at least one bendable and/or twistable guide rail is integrated for guiding a driver to be coupled with a window pane along an adjustment direction and which includes fastening points which are connectable with fastening receptacles of a vehicle door, wherein a twist and/or bend of the guide rail is effected by connecting the fastening points of the base plate with the fastening receptacles of the vehicle door,
 characterized in   that the guide rail ( 3 ;  3   a ,  3   b ) is connected with a rigid region ( 80 ) of the base plate ( 8 ,  8 ′) via connecting portions ( 81 - 87 ) and that at least one connecting portion ( 81 - 87 ) includes a flexible region ( 9 ).   
     
     
         34 . The window lifter according to  claim 33 , characterized in that the guide rail ( 3 ;  3   a ,  3   b ) is bendable about the longitudinal vehicle axis (X-axis) and twistable about the vertical vehicle axis (Z-axis). 
     
     
         35 . The window lifter according to  claim 33  or  34 , characterized in that the rigid region ( 80 ) of the base plate ( 8 ,  8 ′) is arranged between two guide rails ( 3 ;  3   a ,  3   b ) and that the fastening points ( 5 ,  5 ′) at the ends of the guide rails ( 3 ;  3   a ,  3   b ) and at least one supporting point ( 6 ) or further fastening point ( 5 ,  5 ′) are provided between the end-side fastening points ( 5 ,  5 ′) of the guide rails ( 3 ;  3   a ,  3   b ). 
     
     
         36 . The window lifter according to  claim 35 , characterized in that the fastening points ( 5 ,  5 ′) are at least partly arranged at the axles of deflection pulleys ( 131 - 134 ) of the window lifter for guiding and deflecting a window lifter cable ( 12 ). 
     
     
         37 . The window lifter according to at least one of the preceding  claims 33  to  36 , characterized in that the supporting point ( 6 ) consists of a component integrated into the door bodyshell ( 1   a ,  1   b ) of the vehicle door ( 1 ), in particular of a crash barrier ( 1   g ). 
     
     
         38 . The window lifter according to  claim 35  or  36 , characterized in that the connecting portions ( 81 - 87 ) are formed as struts which are connected with the ends and a middle portion of the guide rails ( 3 ;  3   a ,  3   b ). 
     
     
         39 . The window lifter according to  claim 37 , characterized in that diagonal struts ( 81 - 84 ) connected with the ends of the guide rails ( 3 ;  3   a ,  3   b ) contain flexible regions ( 9 ). 
     
     
         40 . The window lifter according to  claim 37 , characterized in that transverse struts ( 85 - 87 ) connected with the middle portion of the guide rails ( 3 ;  3   a ,  3   b ) contain flexible regions ( 9 ). 
     
     
         41 . The window lifter according to at least one of the preceding  claims 33  to  39 , characterized in that the flexible region ( 9 ) is formed of a reduction of the cross-section as compared to the cross-section of a rigid region of the connecting portions ( 81 - 87 ). 
     
     
         42 . The window lifter according to at least one of the preceding  claims 33  to  40 , characterized in that the flexible region ( 9 ) consists of a cross-sectional shape with a lower moment of resistance than the cross-sectional shape of the rigid region. 
     
     
         43 . The window lifter according to at least one of the preceding  claims 33  to  41 , characterized in that the rigid region ( 80 ) of the base plate ( 8 ,  8 ′) and/or of the connecting portions ( 81 - 87 ) is made of a rigid material, in particular of a long glass fiber-reinforced plastic material, and the flexible region is made of a less rigid or flexible material, in particular of a thermoplastic elastomer (TPE) or a material with a lower modulus of elasticity, in particular of non-reinforced polypropylene. 
     
     
         44 . The window lifter according to at least one of the preceding  claims 33  to  39 , characterized in that the flexible region ( 9 ) of the connecting portions ( 81 - 87 ) consists of a wave-like structure of the connecting portions ( 81 - 87 ). 
     
     
         45 . The window lifter according to  claim 44 , characterized in that the wave-like structure of the connecting portions ( 81 - 87 ) extends in longitudinal direction of the connecting portions ( 81 - 87 ). 
     
     
         46 . The window lifter according to  claim 44 , characterized in that the wave-like structure of the connecting portions ( 81 - 87 ) extends in direction of the vertical vehicle axis (Z-axis). 
     
     
         47 . The window lifter according to  claim 44 , characterized in that the wave-like structure of the connecting portions ( 81 - 87 ) extends in direction of the longitudinal vehicle axis (X-axis). 
     
     
         48 . The window lifter according to at least one of the preceding  claims 43  to  46 , characterized in that several flexible regions ( 9 ) of a wave-like structure are provided in the connecting portions ( 81 - 87 ). 
     
     
         49 . The window lifter according to  claims 46  and  47 , characterized in that wave-like structures extending both in direction of the vertical vehicle axis (Z-axis) and in direction of the longitudinal vehicle axis (X-axis) are provided in the connecting portions ( 81 - 87 ). 
     
     
         50 . The window lifter according to at least one of the preceding  claims 33  to  49 ; characterized in that the base plate consists of a mounting frame ( 8 ′) with connecting, portions ( 81 ′- 84 ′), at whose end regions ( 91 - 94 ) articulations ( 95 - 98 ) are arranged for accommodating guide rails ( 3 ;  3   a ,  3   b ) for different window lifters and vehicle doors, respectively. 
     
     
         51 . The window lifter according to  claim 50 , characterized in that the mounting frame ( 8 ′) is formed X-shaped with a rigid middle region ( 80 ′) and four diagonal struts ( 81 ′- 84 ′) proceeding diagonally from the rigid middle region, whose angled end regions ( 91 - 94 ) include variable articulations ( 95 - 98 ) for accommodating different guide rails ( 3 ;  3   a ,  3   b ). 
     
     
         52 . A vehicle window lifter with a base plate into which at least one bendable and/or twistable guide rail is integrated for guiding a driver to be coupled with a window pane along an adjustment direction and which includes fastening points which are connectable with fastening receptacles of a vehicle door, wherein a twist and/or bend of the guide rail is effected by connecting the fastening points of the base plate with the fastening receptacles of the vehicle door,
 characterized in   that the base plate ( 8 ) includes two comparatively flexible guide rails ( 3 ;  3   a ,  3   b ) whose middle regions are connected with each other via a comparatively rigid cross-beam ( 88 ), at whose ends fastening points ( 5 ) are arranged.