KR20050083984A - Window-wiping device, particularly for a motor vehicle - Google Patents

Abstract

Disclosed is a window-wiping device (10), particularly for a motor vehicle, comprising at least one wiper bearing (14) that is provided with a bearing housing (24), a wiper shaft (22) which is mounted within the bearing housing (24) and supports a wiper arm (28) at a first end (26) thereof, and an element (42) that supports the wiper shaft in an axial direction and is embodied in an elastically deformable manner, especially as a spring.

Description

In particular, the windshield wiper device for vehicles {WINDOW-WIPING DEVICE, PARTICULARLY FOR A MOTOR VEHICLE}

The present invention relates to a vehicular glass wiper device according to a higher concept of the independent claims.

A plurality of glass wiper devices comprising wiper bearings comprising at least one bearing housing supported by the wiper shaft and axially fixed by the elements are already known from DE 199 03 140 A1, for example. The wiper shaft supports the wiper arm at the first end, on which the wiper blade is fixed. An axial fixation is made such that the element deforms in the state of receiving energy when a force is applied on the wiper arm or on the first end of the wiper axis. If a pedestrian hits the wiper arm or the wiper axis during an accident, they can be retracted, thereby preventing or at least reducing the pedestrian injury. The fact that the element can receive energy also prevents the pedestrian from colliding onto the vehicle body at full collision energy by the retraction of the wiper arm. To this end, the elements are formed from thin sheeted bushes arranged in series which may also comprise corrugated areas. However, these elements are costly and expensive to manufacture and cannot be repaired after a crash.

1 is a perspective view of a glass wiper device according to the present invention.

2 is a schematic sectional view through a wiper bearing according to the invention before a collision.

The glass wiper device according to the invention comprising the features of the independent claim has the advantage that a pedestrian collision avoidance method is provided which is very efficient and simply dimensioned for the glass wiper device by forming the element elastically, in particular spring-like. In addition, such glass wiper devices can be repaired very easily after a crash.

By means of the means mentioned in the dependent claims, advantageously other embodiments and improvements of the features mentioned in the independent claims are disclosed.

A simple embodiment of the glass wiper device according to the invention is provided by means of which the wiper shaft comprises a protrusion and an element disposed between the bearing housing and the protrusion.

In a simple embodiment, the protrusions are disc shaped and clamp around the wiper shaft.

In a variant, the protrusion is integrally formed with the wiper shaft.

Particularly advantageously, the wiper shaft is axially fixed in particular to the bearing housing by the other projection, which is formed from the broken part. This achieves a particularly large axial stability of the wiper shaft, while at the same time the advantages of the retracting wiper shaft do not have to be abandoned.

Particularly advantageously, the other projections are formed of plastic parts, in particular plastic disks or plastic pins. Of course, other materials can also be used, such as ceramic, metal or carbon materials.

Particularly effective pedestrian collision avoidance can be realized by the fact that the element is subjected to internal stresses between the protrusions and other protrusions.

A cost effective embodiment can be achieved by the element being formed of a screw spring, a leaf spring or a rubber spring.

Particularly advantageously, the wiper shaft is driveable through the crank, which drive crank is formed integrally with the projection or is itself used as a projection for the element.

If the element is corrosion resistant, in particular galvanized, the life of the glass wiper device according to the invention is extended.

Advantageously, the bearing housing, wiper shaft or protrusion comprises anti-rotation fixing means of the element.

Embodiments of the present invention are shown in the drawings and described in more detail in the following detailed description.

1 shows a glass wiper device 10 according to the invention in a perspective view. It essentially comprises a support tube 12 supporting the wiper bearings 14 at the ends of their longitudinal extensions, respectively. Moreover, the motor carrier 16 which supports the wiper motor 18 is fixed to the support pipe 12. The wiper motor 18 drives the wiper shaft 22 supported by the bearing housing 24 of the wiper bearing 14 via the connecting rod 20. In addition, the connecting rod 20 is connected to the drive crank 32, which is again fixedly coupled to the wiper shaft 22.

In addition, the wiper bearing 14 also includes a fixing lug 15 disposed on the side of the wiper bearing 14 opposite to the support tube 12. A rubber sleeve 17 is seated in the stationary lug 15 for vibration damping of the system.

In figure 2 the wiper bearing 14 of the glass wiper device 10 according to the invention is shown in detail in a schematic cross section.

The wiper shaft 22 is supported in the essentially tubular bearing housing 24 of the wiper bearing 14. The wiper shaft 22 includes a first end 26 that is rotationally fixed to a wiper arm, not shown here for the sake of overview. This first end 26 comprises a tapered section which is threaded towards the end of the wiper shaft 22. The drive crank 32 is rotationally engaged with the wiper shaft 22 in the region of the first end 26. This drive crank 32 is again articulated with the connecting rod 20 (FIG. 1). The wiper shaft also includes a protrusion 34 which is formed in a disk shape and fixed on the wiper shaft in the axial direction. In a variant, the protrusion 34 can also be formed integrally with the wiper shaft 22 or can also be formed through the drive crank 32 itself. In another variant, the projection 34 is formed as a disk which is radially and axially movable, and its axial mobility may be limited via the drive crank 32. In principle, however, the projection may at least partly comprise a ring-shaped groove or hole, into which a snap ring or pin or bolt is inserted.

The wiper shaft 22 protrudes from the end face 36 of the bearing housing 24 such that the threaded spring element 42 is fixed between the protrusion 34 and the end face 36 of the bearing housing 24. . For the support of the element 42, another projection 35 in the form of a resin disc is arranged on the end face 36 of the bearing housing 24. The other projection 35 is used here as a broken part so as to be fixedly engaged with the wiper shaft 22 but to be broken when the predetermined minimum force is applied or to be displaced in the direction of the projection 34 on the wiper shaft 22. . In this way, the axial displacement of the wiper shaft 22 in the bearing housing 24 can be defined so that the spring 42 is used when overcoming the minimum force. Since the spring generally has a linear force function, in this way, the first end of the wiper shaft 22 before the wiper shaft 22 can be retracted and the wiper shaft 22 can be inserted into the bearing housing 24. The minimum force that must be applied on (26) can be limited. This is particularly advantageous when the spring 42 is subjected to internal stresses between the projection 34 or drive crank 32 and other elements 35 in normal operation. Of course, the spring 42 may be subjected to internal stresses between the protrusions 34 and the bearing housing 24, so that the wiper shaft 22 is maintained in the operating position through the internal stresses of the springs 42. Of course, for the expansion of the plane of the end face 36, a metal disk may be fixed on the wiper shaft 22.

In order to extend the spring path of the element 42, for example, the inner diameter of the element 42 is chosen to be larger than the outer diameter of the bearing housing 24 in the region of the end face 36 of the bearing housing 24. It is also possible for 42 to overlap the bearing housing in the region of the end face 36. In this case, the other projection 35 can be formed around the outer surface of the bearing housing 24 as a ring.

In another variant, the other projection 35 can be complemented to the bearing housing via another ring, and the spring 42 can be supported on the other ring when the other projection 35 breaks. Therefore, the other protrusion 35 may be formed in a double structure. Of course, a projection-ring combination or the like may be used as the other projection 35.

To prevent the wiper shaft 22 from falling out of the bearing housing, the wiper shaft 22 comprises a groove comprising a snap ring supported at the bearing housing 24 at an end opposite the first end 26 thereof. The blockage made thereby may also be used to generate the internal stress of the spring 42.

Of course, it is also possible to arrange the drive crank 32 not on the end face 36 of the bearing housing 24, but on the opposite side, downward in FIG. 2. In this case, the protrusion 34 must of course be fixedly engaged with the wiper shaft 22. Since the other projection 35 is in principle removed, the spring 42 is supported directly on the end face 36 of the bearing housing 24. If necessary, in this case, the minimum force cannot be set or a separate means must be provided for it.

If a force acts on the first end 26 of the wiper shaft 22, it is displaced into the bearing housing 24. The details are as follows. The force F acts in the vertical direction on the wiper axis 22. The other projection 35 coupled with the wiper shaft 22 is engaged with the wiper shaft 22 such that it displaces on the wiper shaft 22 when overcoming the minimum force. If a force F acts on the first end 26 of the wiper shaft 22, it remains in the set position until the minimum force is reached. If the minimum force is exceeded, the other projection 35 can slide along the wiper shaft 22, and the spring formed element 42 is compressed. This compression accommodates energy to protect pedestrians before they cause more injury.

If the other protrusion 35 is formed of a broken part, the other protrusion 35 breaks when the minimum force is applied, so that the wiper shaft 22 is in the state of overcoming the spring force in the bearing housing 24. Is displaced through. In this case, the other protrusion 35 may be formed of a synthetic resin snap ring that is coupled into a circular groove of the wiper shaft 22, for example. The snap ring 35 can be easily replaced again after the collision. In this variant, unless the size is selected such that the inner diameter of the element 42 is larger than the outer diameter of the bearing housing 24, the end face 36 of the bearing housing 24 as well as the element 42 is at least at least. It should be sized to be able to be partially supported on the end face 36. In this way, the element 42 can be displaced through the bearing housing 24, which must be held or supported by a separate, separate protrusion, not shown here.

In another variant of the invention, the bearing housing 24 comprises fastening means 37 which prevents rotation and / or displacement of the element 42 in the absence of a load.

Of course, any combination of the shown variants of the invention may be contemplated, and possible and useful.

As described above, the present invention can be used for wiper devices and the like.

Claims (11)

At least one wiper bearing 14 comprising a bearing housing 24, a wiper shaft 22 and a wiper shaft 22 supported on the bearing housing 24 and supporting the wiper arm 28 at the first end 26. In particular a vehicle windscreen wiper device 10 comprising an element 42 capable of supporting axially) The element 42 is elastically deformable and is in particular formed of a spring. The glass wiper device (10) according to claim 1, characterized in that the wiper shaft (22) comprises a protrusion (34) and the element (42) is disposed between the bearing housing (24) and the protrusion (34). 3. The glass wiper device (10) according to claim 2, wherein the projection (34) is shaped like a disk and surrounds the wiper shaft. 4. The glass wiper device (10) according to claim 2 or 3, wherein the protrusion (34) is formed integrally with the wiper shaft (22). 5. The glass wiper device according to claim 2, wherein the wiper shaft 22 is axially fixed, in particular to the bearing housing 24, by another projection 35 formed from a broken part. (10). 6. The glass wiper device (10) according to claim 5, characterized in that the other projection (35) is formed of a plastic component, in particular a plastic disk or a plastic pin. 7. Glass wiper device (10) according to claim 5 or 6, characterized in that the element (42) is subjected to an internal stress between the projection (34) and the other projection (35). 8. Glass wiper device (10) according to any one of the preceding claims, characterized in that the element (42) is formed of a screw spring, a leaf spring or a rubber spring. 9. The element 42 is driveable through the drive crank 32 about the wiper axis 22, the drive crank 32 being integral with the protrusion 34. Glass wiper device (10), characterized in that it is formed as or used by itself as a projection (34). 10. The glass wiper device according to claim 1, wherein the element is corrosion resistant, in particular galvanized. The bearing housing 24, the wiper shaft 22 or the protrusion 34 comprise rotation and / or displacement preventing fixing means 37 of the element 42. Glass wiper device (10), characterized in that.