Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
  • B60S1/16—Means for transmitting drive
  • B60S1/18—Means for transmitting drive mechanically
  • B60S1/24—Means for transmitting drive mechanically by rotary cranks
  • B60S1/245—Means for transmitting drive mechanically by rotary cranks with particular rod arrangements between the motor driven axle and the wiper arm axle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/043—Attachment of the wiper assembly to the vehicle
  • B60S1/0436—Attachement of separate wiper shaft holders to the vehicle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/34—Wiper arms; Mountings therefor
  • B60S1/3402—Wiper arms; Mountings therefor with means for obtaining particular wiping patterns
  • B60S1/3406—Wiper arms; Mountings therefor with means for obtaining particular wiping patterns the wiper blades being rotated with respect to the wiper arms around an axis perpendicular to the wiped field
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/04—Wipers or the like, e.g. scrapers
  • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
  • B60S1/34—Wiper arms; Mountings therefor
  • B60S1/3488—Means for mounting wiper arms onto the vehicle
  • B60S1/349—Means for mounting the wiper bearing to the vehicle body

Definitions

• the present invention relates to a pantograph wiper, especially for a motor vehicle comprising a so-called panoramic windshield.
• a windshield is said to be panoramic when it includes portions of lateral ends that return to the sides of the vehicle, and therefore has on each side an area of very strong curvature.
• pantograph type wiper to optimize the path of the wiper blade relative to the windshield so that a larger surface of the windshield is scanned.
• the principle of such a pantograph-type wiper is to print on the wiper blade a non-circular path on at least some portions of the windshield (in particular the lateral end portions), unlike a wiper. classic ice for which the trajectory of the broom is circular over the entire surface of the windshield.
• the pantograph type wiper comprises, as shown schematically in Figure 1, an arm 1 carrying the brush 2 and formed of two rods substantially parallel to each other in the rest position, to know :
• a first rod 10 hereinafter referred to as the main rod, of which a rear end 11 is stationary in position, this main rod 10 being able to rotate, thanks to a drive shaft in rotation of an engine electric motor (not shown) allowing an alternating sweeping movement around a main pivot axis passing through this rear end 11 housed in a bearing (not shown in Figure 1) in which it can rotate; and a second rod 12, hereinafter referred to as a secondary rod, a rear end 13 of which is also also fixed in position, this secondary rod being also rotatable about a secondary pivot axis parallel to but distinct from the main axis , and passing through this rear end 13.
• the wiper further comprises a substantially L-shaped end link, a first side 30 of the form of "L” connecting the other two ends, said front ends respectively main and secondary rods 12, and the other side 31 of the "L” shape carrying the wiper blade 2.
• the connections are provided so that the first side 30 of the "L” -shaped rod can pivot in the plane of the rods 10, 12 on the one hand, with respect to the secondary rod 12 and on the other hand, with respect to at the main rod 10 about distinct axes of rotation, substantially parallel to the main pivot axis and the secondary pivot axis, thereby causing the other side 31 of the "L” shape to pivot; .
• the end link 30, 31, the main rod 10 and the secondary rod 12 form, with the body of the vehicle, a deformable quadrilateral, and the blade 2 carried by the end link has an orientation relative to the main rods 10 and secondary 12 which varies according to the relative angular position of these rods during their rotational movement about their respective pivot axis.
• This variation of the orientation of the wiper is shown in FIG. 1 for three distinct positions of the wiper: a first rest position in which the arm / wiper assembly is substantially aligned with the lower edge of the windshield, an intermediate position, and an extreme position.
• a pantograph-type wiper in which this variation of the orientation of the blade is obtained.
• lateral end S as schematically show the intermediate position and the extreme position of Figure 1, between which the orientation of the blade is increasing.
• pantograph-type wiper is not always adapted to obtain a good quality of wiping.
• another criterion for obtaining quality wiping lies in the angle of attack of the blade, namely the inclination of the blade at its point of connection with the arm relative to the normal to the surface. windshield.
• pantograph wiper described above does not allow to vary the angle of attack as specified above, and in the case of a panoramic windshield, one can find, as illustrated in the figure 2, with a broom 2 forming, at the level of the lateral zone, an angle of attack ⁇ with the normal N windshield much too important. This results in particular that the broom will not be positioned correctly in terms of angle of attack when it begins its scan back to the rest position.
• the present invention aims to improve the pantograph type wiper described above to increase the efficiency of wiping, even in the side end portions of the windshield.
• a windshield wiper of the pantograph type in particular for a motor vehicle comprising a panoramic windshield comprising at least one side end portion of strong curvature, windshield wiper of the type comprising a arm carrying a broom and consisting of at least one main rod movable in rotation about a main pivot shaft passing through a rear end of the rod main, this main pivot shaft being housed in a bearing and rotated by means of a motor via a first arrangement of connecting rods, to ensure this rotation for the movement of the blade in the front portion of the windshield, characterized in that said bearing is then pivotally driven about an axis transverse to said pivot shaft at an angle ensuring the displacement of the blade on said lateral end portion.
• the operation of a pantograph wiper which is known to optimize for proper operation, is not changed when the blade moves on the front portion of the windshield. Its classic displacement is modified and adapted only in the extreme lateral part of the panoramic windshield.
• the invention also provides a particularly compact and discrete drive arrangement, not external to the body of the motor vehicle.
• connecting rod means a long and rectilinear piece connecting two moving parts.
• said bearing is pivotally driven by means of a second arrangement of rods driven by said motor.
• said first arrangement of rods is constituted by a crank, said primary link, secured to said main pivot and a connecting rod, said secondary link, connected to an output shaft of said motor by a conversion arrangement in oscillation motion.
• said bearing is supported by a fixed part relative to the vehicle and on which it can pivot at said angle.
• said second arrangement of connecting rods comprises a first crank-link pair of which a connecting rod, called first connecting rod, is connected to said bearing by means of converting a translation movement into pivoting movement of the latter about said transverse axis and a connecting rod, said second connecting rod, is pivotable about a fixed axis, said return bearing, and abuts against a fixed part by by means of an elastic buffer, and a second crank-link pair, of which a connecting rod, called the third connecting rod, is connected to the end of said secondary link, and a crank, called the fourth connecting rod, has its pivoting end around said bearing.
• a selection arrangement, said selector ensuring the pivoting of said bearing, when the wiper is on said lateral end portion, is disposed on said return bearing.
• said selector comprises an abutment arrangement integral with said fourth connecting rod and intended to abut with a part integral with said second connecting rod, at the inlet of the blade in said lateral end portion, the breeder also comprising a coupling arrangement. immobilization of the second connecting rod disengaging at the entrance of the blade in said lateral end portion.
• said immobilization arrangement consists of a tenon integral with said return bearing and cooperating with grooves arranged on said second connecting rod and on the breeder.
• said means for converting a translation movement into pivoting movement consists of a ball carried by the main pivot and housed in a cavity of the first rod.
• FIGS. 9 to 11 are detailed perspective views, in the rest, intermediate and extreme position respectively
• Figures 12 and 13 are longitudinal sectional views of the main pivot, respectively in the rest position or intermediate and extreme position.
• the wiper comprises an arm carrying a wiper blade, the arm consisting of at least: a movable main stem 10 in rotation about a main pivot axis passing through a rear end of the main rod,
• a secondary rod 12 rotatable about a secondary pivoting axis, substantially parallel but distinct from the main axis of pivoting and passing through a rear end of the secondary rod,
• a connecting means 30 connecting the front ends of the main and secondary rods 12 so as to be pivotable in the plane of the rods relative to the main rod 10 and to the secondary rod 12 during the rotational movements of these rods around their respective pivot axis.
• main stem is here related to the fact that it is the rod whose rotational movement is controlled by the rotation of the drive shaft of an electric motor 40 located in the driving device of the wiper arm and mounted on a fixed plate 46.
• the other rod is called secondary because its rotational movement is driven by that of the main stem.
• the arm also comprises a fastening means 31 to which is attached the blade 2, the fastening means 31 being integral in rotation with the connecting means 30 in the plane of the rods so as to have an orientation relative to the rods which varies according to the relative angular position of these rods during their rotational movement about their respective pivot axis. Consequently, according to a conventional mode of operation of a pantograph, the rotational movement of the main rod 10 about its pivot axis will cause, thanks to the connecting means 30, also a rotational movement of the secondary rod 12 around its pivot axis, and the parallelogram comprising the two rods 10, 12 and the connecting means 30 will be able to deform due to the possible pivoting about two axes. The variation of relative angular position of the two rods resulting from this deformation will generate a proportional variation of the orientation of the attachment means.
• the pantograph type wiper therefore comprises an arm carrying a blade and consisting of at least one main rod 10 rotatable by a main pivot 41 passing through a rear end of the main rod, this pivot main being housed in a bearing 42 and rotated by means of a motor 40 via a first arrangement of rods 51, 52, to ensure this rotation for the movement of the blade in the front portion of the bumper -broken.
• This bearing 42 is then pivotally driven about a transverse axis 43 to this main pivot on an angle ensuring the displacement of the blade on the lateral end portion S of the windshield, otherwise said intermediate position to said extreme position.
• the first arrangement of connecting rods 50 consists of a connecting rod 51, called the primary connecting rod, integral with the main pivot 41 and a connecting rod 52, called a secondary link, connected to an output shaft 43A of the motor 40 by a oscillation movement converting arrangement 44, consisting of a rod integral in rotation with the output shaft 43A of the motor 40.
• the bearing 42 is supported by a fixed part 45 relative to the vehicle and on which it can pivot at the angle ensuring the displacement of the blade on the lateral end portion S of the windshield.
• the second arrangement of connecting rods comprises a first crank-link pair 60, of which a connecting rod 61, called the first connecting rod, is connected to the main pivot 41 carried by the bearing 42 by means of converting an oscillating movement into pivoting movement. of the latter about the transverse axis 43 and a connecting rod 62, said second connecting rod, is pivotable about a fixed axis 80, said return bearing, and is in abutment against a fixed part via a buffer elastic 90, and a second crank-link pair 70 including a connecting rod 71, said third connecting rod, is connected to the end of the secondary connecting rod 52 and the end of a crank 72, said fourth connecting rod, the other end is pivotable about the return bearing 80.
• the second connecting rod 62 has a longitudinally folded flange 62B at its end located on the other side of the return bearing relative to the first connecting rod 61.
• This flange 62B folded long itudinale ensures the stop against the elastic buffer 90.
• This selector 100 is particularly visible in FIGS. 9 to 11.
• the selector 100 comprises an abutment arrangement 101 secured to the fourth connecting rod 72 and intended to abut with an integral portion 62A of the second connecting rod 62, at the inlet of the blade in the lateral end portion S of the windshield.
• the breeder 100 also comprising an immobilization arrangement of the second connecting rod 62 is disengaging at the inlet of the blade in this lateral end portion S.
• the stop arrangement 101 is formed on the body of the selector 100 itself secured to the fourth rod 72.
• the integral portion 62A of the second connecting rod 62 is advantageously formed of a transverse folded flange of this connecting rod.
• This immobilization arrangement consists of a pin 102 integral with the return bearing 80 and cooperating with grooves 62C, 102A arranged on the second connecting rod 62 and the selector 100.
• the first connecting rod 61 is connected to the bearing 42 by means of converting an oscillating movement into a pivoting movement of the latter around the transverse axis 43.
• this means for converting an oscillation movement into a pivoting movement consists of a ball 95 carried by the main pivot and housed in a cavity of the first link 61.
• the fixed part 45 is fixed to the body or an integral part thereof through an orifice 45A and carries the pivot axis 43 which is mounted on the bearing 42 the main pivot 41.
• This main pivot 41 carries the ball joint 95 mounted in a cavity arranged at the end of the first rod 61.
• first pair of crank-connecting rod 60 remains fixed, blocked by the pin 102 linking the second connecting rod 62 with a fixed piece secured to the support plate 46.
• the second pair of crank-rod 70 meanwhile freely follows the movement of the first arrangement of rods 50 driving with it the selector 100 to the stop of the stop arrangement 101 integral with the fourth connecting rod via the body 102 with the crushed flange 62A of said second connecting rod.
• the tenon 102 is released through a groove 102A arranged on the selector 100 and releases accordingly the first crank-link pair 60.
• the selector 100 is then always rotated and pushes, via the stop arrangement 101 and the transverse folded flange 62A, the first crank-link pair 60 of the intermediate position. towards the extreme position shown in FIGS. 7, 8, 11 and 13.
• the first connecting rod 61 makes a pulling movement on the ball 95 and causes the pivoting of the bearing 42 and thus of the main pivot 41 about the transverse axis 43. Furthermore, the fixed elastic buffer 90 is deformed by compression by pressing the longitudinally folded flange 62A of the second connecting rod.
• main crank 50 integrally connected to the main pivot is arranged to be able to cash a slight transverse movement during this pivoting.
• the elastic buffer 90 relaxes and pushes the second connecting rod 62 so that the latter and the selector 100 pass from the position shown in FIG. 11 to the position shown in Figure 9, ensuring the clutch of the tenon immobilization arrangement 102, and the immobilization of the second rod 62.
• the bearing 42 of the main pivot 41 returns simultaneously in the not rotated. The broom is then moved to the rest position, conventionally with a pantograph mode.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transmission Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34950776

Family Applications (1)

Country Status (3)

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Family Cites Families (4)

• 2004
  • 2004-11-05 FR FR0411852A patent/FR2881092B1/fr not_active Expired - Fee Related
• 2005
  • 2005-11-03 EP EP05807827A patent/EP1807291A1/de not_active Withdrawn
  • 2005-11-03 WO PCT/EP2005/011764 patent/WO2006048284A1/fr not_active Ceased

Non-Patent Citations (1)

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