FR2624077A1 - ICE WIPER ARM WITH SOLIDARY HUB ELEMENT OF ICE WIPER SHAFT DRAWN INTO PENDULUM MOVEMENT - Google Patents

Abstract

Windscreen wiper characterized in that the support arm 18 and the hub element 12 comprise notching means, which cooperate with one another, when the wiper 20 of the wiper is disengaged from a determined distance, corresponding to an alpha pivot angle, of the ice to be wiped. The invention relates to a wiper arm provided with a hub element integral with a wiper shaft driven in a pendulum motion.

Description

"Wiper arm with a hub element

  lidar of a wiper shaft driven into a

  The invention relates to a wiper arm of the type comprising a hub element which connects

  a windshield wiper shaft driven in one

  pendulum, and a support arm which, connected to

  this hub element by a hinge, can pivo-

  ter around the axis of this articulation in a plane rising on the ice to be wiped, and is provided at its free end located opposite the articulation, a device for fixing in position a squeegee wiper. We already know a wiper arm of a

  wiper device for motor vehicle windows

  bile (German Patent 26 07 365)., wherein the support arm against the action of a prestressed tension spring - which has the role of ensuring pressure

  of application in accordance with the requirements of the

  the wiper against the wiping ice, since this spring is fixed at one end to the support arm and at its other end to the hub element - may, for example to change the squeegee of the wiper. wiper, be cleared by pivoting, enough

  away from the ice, so that a connecting line

  the two fixing points of the spring come from

  side of the joint located opposite the ice.

  This results in an imperative locking of the arm

  windshield wiper, when this arm has been rotated

  enough, in practice up to 60 degrees. However, this is no longer possible when the hub element of the wiper arm, for example for styling purposes of the vehicle, is covered by a

  part of the vehicle body.

  The invention is intended to remedy such drawbacks and concerns for this purpose an arm

  windshield wiper - of the type indicated in the preamble -

  which is essentially characterized in that the support arm and the hub member have latching means which cooperate with each other when

  the squeegee of the windscreen wiper is disengaged

  determined - corresponding to a certain angle of

  pivoting the support arm - ice to wipe.

  A wiper arm thus arranged in accordance

  to the present invention, with regard to the

  known advantages, the advantage that the distance from the

  The wiper blade can be determined according to the data, so that already after a pivot angle of, for example, 17 degrees, the wiper arm

  can be fixed in its release position.

  As another advantage, it should be considered that it avoids the "over-extension" required with the known wiper arms, the application pressure spring, which allows to prescribe in advance simpler standard conditions for the design of the

pressure spring.

  Through various means which will be indicated in the following, it is possible to obtain advantageous embodiments, and improvements of the

  windshield wiper arm according to the invention as de-

finished above.

  According to another characteristic of the in-

  the means of notching the hub member are susceptible to elastic deflection, and the counter-locking means of the support arm are

in solidarity with it.

  According to another characteristic of the in-

  the means of notching the hub element consist of balls, loaded by springs,

  which engage in recesses in the support arm

  port constituting the means of counter-locking.

  According to another characteristic of. linen-

  vention, the wiper arm, whose pre-

  feel, at least in the area of the joint,

  a U-shaped cross-section, is characteristic of

  in that, between the U-branch of the support arm

  extends a protrusion of the hub element, on which

  are mounted the balls, loaded by springs, in

look at the branches of the U.

  According to another characteristic of the in-

  vention, the protrusion of the hub element presents a

  parallel bore, at least approximate

  the axis of the joint and which also receives

  well the balls that their means to springs.

  According to another characteristic of the in-

  vention, each ball protrudes from a mouth of

  the bore, and the spring means are disposed

be the two marbles.

  According to another characteristic of the in-

  vention, each ball is fixed captively

in the bore.

  According to another characteristic of the in-

  each ball is maintained, imperceptibly

  ble, in a pot-shaped housing, in that on each side a prestressed spring rests on the bottom of the pot on the one hand and on the ball on the other hand and

  each prefabricated building element thus con-

  titué is inserted into the bore.

  According to another characteristic of the in-

  vention, the recesses of the support arm are provided

on the U branches of it.

  According to another characteristic of the in-

  vention, the U-branches of the support arm are

  forced into the area of the recesses.

  According to another characteristic of the in-

  In the invention, the reinforcement of U-limbs is provided by a U-shaped stirrup inserted in the support arm, integral with the latter and whose U-shaped limbs have the recesses serving as means for

against-notching.

  The invention will be better understood by means of

  the following description and the attached drawings represent

  an example of an embodiment of the invention,

in which:

  FIG. 1 is a side view of a wiper arm

  ice in working position;

  FIG. 2 is a partial sectional view in

  lengthwise, on an enlarged scale, an area

  of that wiper arm designated by II on the

gure 1;

  FIG. 3 is a sectional view of the wiper arm

  ice along line III of Figure 2; - Figure 4 is a longitudinal sectional view according to Figure 2 of the wiper arm in a position obtained after crimping; and

  FIG. 5 is a sectional view of the wiper arm

  ice according to Figure 4, along the line V-V.

  A wiper arm 10 shown on the

  FIG. 1 comprises a hub element 12 which is solidly

  14 of a shaft 14, this wiper shaft being driven in a pendulum motion. On the hub element 12 is articulated, by means of a hinge 16,

  a support arm 18, and at the free end of this

  it, located opposite the hinge 16, is mounted a device formed in the form of hook

  connecting piece 19, for fixing a wiper squeegee

  ice 20 shown in dot-dots. This raclette

  applied by a wiper element 22 on the surface

  face of a windshield glass 24. The articulation 16 and

  arranged in such a way that its axis

  in the plane of oscillation, so that the support arm pivots together with the squeegee

  in a plane rising on the ice 24 to be wiped.

  Inside the U-shaped cross-section support arm, there is provided a tension spring 28, shown in FIGS.

  lines in broken lines and which is fixed by the

  The other end, not shown, of the tension spring 28 is attached to the support 18 of the wiper arm 10. As can be seen from FIG. according to

  2, the hinge 16 is on the side, if

  killed opposite the ice 24 to be wiped, a line 34 which extends in the longitudinal direction of the tension spring 28 and intersects the attachment points 32 on the hub member 12 and the support arm 18. This results in a force component, represented in FIG. 1 by the arrow 36, which pivots the support arm 18 around the hinge 16 in a clockwise direction and thus presses the squeegee

  the wiper against the ice 24 to be wiped.

  As shown particularly in the figures

  2 and 4, the hub member 12 extends through a projection 40 in the support arm 18 of U-shaped cross-section. At the free end of the projection 40, the latter has a transverse bore

  42 (FIGS. 3 and 5), whose axis extends essentially

  parallel to the axis of the hinge 16. In the bore 42 is inserted in the region of each of the two mouths, a housing 44 in the form of pot. In

  each of these dwellings is maintained, imper-

dable, a ball 46.

  In addition, in each of the dwellings 44 in

  In the form of pots there is a pressure spring 48

  constrained, which relies, on the one hand, on the substance of the

  pot and, on the other hand, on ball 46. As regards

  this element of construction, prefabricated

  In this way, the assembly is designed so that each of the balls 46 is projecting from a little less than half a ball diameter of its housing.

pot-shaped.

  On the other hand, it has been ensured that

  placed opposite each other of the two balls

  46 is located close to the interior surfaces,

  5 and 50 of the U-shaped support arm 18 in cross-section are killed opposite one another. As can be seen further from FIGS. 2 to 5, the branches 50 and 52 of the U formed by the support arm 18 are reinforced in the region of the two balls 46 by a stirrup 54 of cross-sectional shape. As this yoke 54 is rigidly connected to the support arm 18, it may also be referred to as a part of this arm

of support.

  As shown particularly in the figures

  2 and 4, the yoke 54 has in the zone of its two U-branches 56, 58, reliefs released by cutting 60, whose role is that the balls 46

  located clear of the support arm 18 ..

  These cutouts 60 consequently have a curved edge 62

  co-axially with respect to the axis of rotation of the

  16. Since the clearances 60

  cut in both branches 56 and 58 are

  tend to their median zone, there is still a terminal portion 64, wider, branches 56, 58, which is in the area of the free ends

of these branches of U 56, 58.

  In each of these enlargements 64 is

  swam a bore 66 which lies on an imaginary circle

  surrounding the axis of the articulation 16 and whose radius corresponds to the dimension of the distance between the axis of the articulation 16 and the axis of the bore 46

  - formed in the projection 40 of the hub member 12.

  When the support 18 of the wiper arm

  10 rotates at an angle a in the opposite direction of the

  guilles of a watch, and must be fixed in this

  sition, the widened parts 64 of the U-shaped stirrup 54

  press the balls 46 inwards against the

  this springs 48 mounted between them, since the size of the enlargements 64 is greater than

  the distance between the balls 46 and the inner faces

  res, located opposite these, branches 56 and 58 of the reinforced support arm 18, 54. The balls 46 are pressed inwards and arrive

  thus, when the support arm 18 continues its

  in the bores 66 in the

  widened 64 and then acting as notches.

  This position is represented in the figures

  4 and 5. In this way, is obtained a blocking of any safety support arm 18 in the release position, allowing to proceed without difficulty to specific work on the ice 24 of the motor vehicle or raclette 20 of the windshield wiper. It is clear that the notching force exerted on the balls 46 must necessarily be greater than the pressure force exerted by the prestressed tension spring 28, which acts in the direction of the arrow 36. The balls 46 thus constitute means of locking , mounted on the hub member 12, 40, which cooperate with the recesses 66, formed in the arm

  18 and constituting the means of counteracting

  notch and fix this support arm in a posi-

  tion in which the squeegee 20 of the wiper is released, a determined distance, corresponding to the angle a, of the ice 24 to be wiped. The notching device is thus separated from the pressure device

of application 28.

Claims (10)

R E V E N D I C A T I ONS   1) Wiper arm with an element   hub connecting rigidly to a tree of trees.   soot-ice driven in a pendulum motion, and a support arm which, connected to this hub element by   a joint, can rotate around the axis of this-   hinge in a plane rising on the ice to be wiped, and is provided at its free end located opposite the hinge, a device for fixing in position a squeegee wiper arm   wiper system characterized in that the support arm   port (18) and the hub member (12) have latching means (46, 66) which cooperate with each other when the wiper (20) of the windscreen wiper is disengaged from a determined distance, corresponding to   an angle (a) of pivoting, ice to wipe.   2) Wiper arm according to the claim   1, characterized in that the notching means (46) of the hub member (12, 40) are susceptible to elastic deflection, and the means for   counter-lock (66) of the support arm (18) are lidaries of it.   3) Wiper arm according to any one   than claims 1 and 2, characterized in that   the notching means of the hub element (12, 40)   are constituted by balls (46) loaded with   spells, which engage in recesses (66) of the support arm (18, 54) constituting the counter-locking means.   4) Wiper arm according to the claim   3, the support of which has, at least in the region of the joint, a U-shaped cross-section, characterized in that between the limbs   U (50, 52) of the support arm (18) extends   (40) of the hub element (12), on which   mounted the balls (46), loaded by springs, in guard of the branches of the U.    ) Wiper arm according to the claim   4, characterized in that the projection (40) of the   the hub element (12) has a through bore (42) parallel, at least approximately, to the axis of   the articulation (16) and which receives both the   the (46) than their spring means (48).   6) Wiper arm according to the claim   5, characterized in that each ball (46) projects from a mouth of the bore (42), and in that the spring means (48) are arranged between the two balls (46).   7) Wiper arm according to the claim   6, characterized in that each ball (46) is   captively fixed in the bore (42).   8) Wiper arm according to any one   than claims 5 to 7, characterized in that   each ball (46) is held captively in a pot-shaped housing (44), in that on each side a prestressed spring (48) rests on the bottom of the pot on the one hand and on the ball (46) other   part and in that each building element   manufactured thus made is inserted into the bore (42).   9) Wiper arm according to any one   than claims 4 to 8, characterized in that   the recesses (66) of the support arm (18) are   seen on U branches (56, 58) thereof.   100) Wiper arm according to the claim   9, characterized in that the U-limbs (50, 52) of the support arm (18) are reinforced in the recess area (66).   11) Wiper arm according to the claim   10, characterized in that the reinforcement of the U-branches (50, 52) is carried out by a stirrup (54)   U-shaped insert in the support arm (18), so-   lidaire thereof and whose U-limbs (56, 58) have the recesses (66) serving as counter-locking means.