Adapter unit

Abstract

The invention relates to an adapter unit which is arranged to couple, in particular releasably couple, a wiper blade to a wiper arm. The adapter unit has a wind deflector which is arranged to block the inflowing air and press the wiper blade against the vehicle glass, and the adapter unit has a pivot bearing which is arranged to pivotally support the wiper arm relative to the wiper blade. Wherein, the pivot bearing has at least two struts which are arranged substantially vertically on the adapter bottom surface, and each of the struts has a hinge pin respectively, the hinge pin is oriented parallel to or substantially parallel to the support axis and is arranged to support the wiper arm and / or the wiper arm adapter unit. The invention proposes that the windward strut of the at least two struts has a smaller height than the leeward strut of the at least two struts, in particular the height of the at least two struts corresponds to the height profile of the wind deflector.

Description

Field of the Invention

[0001] The present invention relates to an adapter unit configured to couple, in particular releasably couple, a wiper blade to a wiper arm, the adapter unit having a windward face configured to block oncoming air and press the wiper blade against a vehicle glass. Background Art

[0002] A wiper device has been proposed which includes a wiper arm and a wiper blade as well as an adapter unit for releasably coupling the wiper arm to the wiper blade. A disadvantage of such a wiper device is that, in order to ensure sufficient wiping performance, the wiper arm must always exert a high pressing force to press the wiper blade against the vehicle glass. Summary of the Invention

[0003] The present invention describes an adapter unit configured to couple, in particular releasably couple, a wiper blade to a wiper arm, the adapter unit having a windward face configured to block oncoming air and press the wiper blade against a vehicle glass, and the adapter unit having a pivot bearing configured to pivotally support the wiper arm relative to the wiper blade, wherein the pivot bearing has at least two struts arranged substantially vertically on the bottom surface of the adapter, each of the struts having a hinge pin respectively, the hinge pin being oriented parallel to or substantially parallel to the support axis and configured to support the wiper arm and / or the wiper arm adapter unit, characterized in that the windward strut of the at least two struts has a smaller height than the leeward strut of the at least two struts, in particular the height of the at least two struts corresponding to the height profile of the windward face.

[0004] This has the advantage that the wind deflector can be positioned by the height of the windward strut and the leeward strut such that the wind deflector presses the wiper blade against the vehicle glass due to the oncoming driving wind during fast driving. This increases the total pressing force of the wiper blade against the vehicle glass and improves the wiping performance. In this way, the required pressing force is reduced, with which the wiper arm presses the wiper blade against the vehicle glass. A more favorable and / or simpler and / or more reliable and / or more compact wiper arm with a smaller pressing force can be used, in particular one with a smaller spring for applying the pressing force. Furthermore, by using the wind deflector according to the invention, it is prevented that the adapter unit or the wiper device comprising the adapter unit, the wiper blade and the wiper arm generates a force due to unfavorable aerodynamics during fast driving, which force acts against the required pressing force and thus deteriorates the wiping performance or even makes wiping impossible. By means of the adapter unit according to the invention, it is ensured that, due to aerodynamic effects, in particular wind, in particular driving wind, the resultant force presses the wiper blade against the vehicle glass. By respectively providing the first partial surface and the second partial surface with different geometries and / or different orientations, an exact adjustment of the pressing force is achieved, in particular an exact adjustment of the orientation of the pressing force.

[0005] The adapter unit is advantageously constructed integrally with the wind deflector. In this context, "integrally" should in particular be understood as a materially locked connection, such as by means of a welding process and / or an adhesive bonding process, etc., and particularly advantageously as a shaping, for example by manufacturing from a casting and / or by manufacturing by a single-component or multi-component injection molding method. Advantageously, the adapter unit is constructed integrally with the pivot bearing.

[0006] The adapter bottom surface is preferably oriented parallel or largely parallel to the vehicle glass in the state in which the adapter unit is mounted on the vehicle. "Largely parallel to" should be understood as meaning that the first axis encloses an angle with the second axis, the deviation of which from 0° is not greater than 8°, advantageously not greater than 5°, particularly advantageously not greater than 2°. "Largely perpendicular to" should be understood as meaning that the first axis encloses an angle with the second axis, the deviation of which from 90° is not greater than 8°, advantageously not greater than 5°, particularly advantageously not greater than 2°.

[0007] Advantageously, the adapter unit is constructed integrally with the adapter bottom surface. Advantageously, the adapter bottom surface is constructed integrally with at least two struts. Advantageously, at least one of the at least two struts is constructed integrally with its hinge pin.

[0008] "The strut is arranged vertically on the adapter bottom surface" should in particular be understood as meaning that the strut is arranged perpendicular to the adapter bottom surface along its length or its maximum longitudinal extent. The height of the strut is preferably measured perpendicular to the adapter bottom surface.

[0009] Advantageously, the pivot bearing is constructed such that the bearing axis is arranged perpendicular or largely perpendicular to the direction of the wiper arm. The "direction of the wiper arm" should be understood as the direction which, in particular in the initial position, runs along the greatest longitudinal extent of the wiper arm mounted on the adapter unit. In the unmounted state, in particular in the initial position, the direction of the wiper arm is the direction in which the mounted wiper arm on the adapter unit points. Advantageously, the bearing axis is arranged parallel or largely parallel to the specified wiping direction. Advantageously, the bearing axis is arranged such that it is parallel or largely parallel to the direction of the oncoming air or parallel to the direction of travel of the vehicle in the non-wiping rest state of the wiper device comprising the wiper arm adapter unit, the wiper blade and the wiper arm mounted on the vehicle glass. Below, the "direction of the oncoming air" should be understood as the direction along which the oncoming air flows in the non-wiping rest state of the wiper device mounted on the vehicle glass. Particularly advantageously, the bearing axis is parallel to the vehicle glass in the state mounted on the vehicle, preferably parallel to the vehicle glass at each position by means of the wiping movement.

[0010] Advantageous refinements of the adapter unit can be achieved by the features listed below.

[0011] Good aerodynamic properties of the adapter unit with sufficient structural space, in particular for accommodating the pivot bearing, can be achieved if the windward surface encloses a main angle with the bearing axis between 25° and 65°, preferably between 40° and 50°.

[0012] The "main angle" should be understood as the angle which the windward surface has relative to the bearing axis. Advantageously, the main angle is measured around the direction of the wiper arm. Here, a positive main angle between 0° and 90° describes a windward surface which is at least partially turned towards the direction of the oncoming air. The closer the main angle is to 90°, the more the windward surface is turned towards the direction of the oncoming air. Advantageously, the main angle is spanned between the bearing axis and its projection onto the windward surface, where this projection is advantageously carried out along a projection plane in which the bearing axis lies and which is perpendicular or largely perpendicular to the direction of the wiper arm. It is also possible for the projection plane to be spanned by the bearing axis and the normal vector or the mean normal vector of the windward surface. In the case of a curved or uneven windward surface, it is conceivable that the main angle is spanned between the bearing axis and the tangential plane, where the tangential plane lies at a marked point on the windward surface - for example the centre - or is the tangential plane of the mean normal vector of the windward surface. The "mean normal vector" is understood as a vector which represents the average of all or almost all normal vectors of the windward surface.

[0013] If the articulation pin has a greater pin radius on the lower side of the pin facing the bottom surface of the adapter than on the upper side of the pin facing away from the bottom surface of the adapter, the advantage is that the scraping arm can be fixed particularly simply and at the same time a particularly reliable coupling of the scraping arm to the pivot bearing is feasible, especially when under high forces. The "pin" is to be understood as a first approximately cylindrical element. The pin radius is the radius of the circular base of the cylindrical element. The pin, in particular a pin according to the invention, can also to a large extent consist of a plurality of cylindrical segments, in particular integrally. Thus, different pin radii of a pin are the radii of different cylindrical segments from which the pin consists. For example, it can be considered that a pin consists of two semi-cylindrical segments, which each have a semi-circle as the base and are arranged such that the semi-circles or the respective central points of the axes of symmetry of the semi-cylindrical segments abut against each other. The lower side of the pin can have a first semi-cylindrical segment, while the upper side of the pin can have a second semi-cylindrical segment. It can also be considered that the pin is composed of a cylindrical segment and a hollow cylindrical segment, in particular a half hollow cylindrical segment and / or a hollow frustum segment, in particular a half hollow frustum segment, which is formed by a hollow cylinder halved along the axis of symmetry, in particular having an inner radius corresponding to a large extent to the radius of the cylindrical segment, and the hollow frustum segment is formed by a hollow frustum halved along the axis of symmetry, in particular having an inner radius corresponding to a large extent to the radius of the cylindrical segment. A "hollow frustum" is to be understood as a frustum that has a cylindrical hole along its axis of symmetry. Preferably, the hollow cylindrical segment and / or the hollow frustum segment have a length that is smaller than that of the cylindrical element along their axis of symmetry. Preferably, the hollow cylindrical segment and / or the hollow frustum segment are each arranged on a strut.

[0014] If at least two struts have a plurality of ribs provided for strengthening the struts, and the ribs are preferably each arranged on the side of the strut opposite to the articulation pin, the stability of the struts is increased. In this way, the reliability of the pivot bearing is further improved. The ribs can be arranged along the height of the strut or perpendicular to or to a large extent perpendicular to the bottom surface of the adapter. In this way, the strut can be stabilized to prevent tilting, especially in the direction of its pin. The ribs can also be oriented parallel to or to a large extent parallel to the bottom surface of the adapter. In this way, the strut can be stabilized to prevent twisting or rotation about its longitudinal axis or around its height. A plurality of ribs is to be understood as at least two ribs. The ribs of a plurality of ribs can each be constructed differently, in particular having different geometries and / or orientations. Preferably, the strut is integrally constructed with the plurality of ribs.

[0015] The scraping arm can be fixed particularly reliably when the articulated pins of at least two struts are oriented relative to each other. In particular, the orientation of the articulated pins of at least two struts relative to each other should be understood as follows: the first articulated pin of the first strut extends out of the first strut in the direction towards the second strut, while the second articulated pin of the second strut extends out of the second strut in the direction towards the first strut. Preferably, the articulated pins are oriented parallel to or to a large extent parallel to the support axis. For example, the first strut can be the windward strut. For example, the second strut can be the leeward strut.

[0016] In a variant that can be considered, the articulated pins point away from each other. In particular, the first articulated pin of the first strut can extend out of the first strut in a direction opposite to that of the second strut, while the second articulated pin of the second strut can extend out of the second strut in a direction opposite to that of the first strut. In another variant, the articulated pins can also be oriented in the same direction, in particular parallel to or to a large extent parallel to the support axis. For example, the first articulated pin and the second articulated pin can each extend in the direction from the first strut to the second strut. The first articulated pin and the second articulated pin can also each extend in the direction from the second strut to the first strut. In particular, the articulated pins can extend in the direction of the wind inflow or against the direction of the wind inflow.

[0017] When the articulated pin spacing from the first articulated pin to the second articulated pin is greater than the sum of the first articulated pin length of the first articulated pin and the second articulated pin length of the second articulated pin, the pivot bearing is further particularly stable against undesired movements, especially elastic deformations. The "articulated pin spacing" should in particular be understood as the spacing along the support axis between the first articulated pin and the second articulated pin. The "articulated pin length of the articulated pin" should in particular be understood as the length of the articulated pin along the support axis. Advantageously, the main extension direction of the articulated pin and / or the main longitudinal extension direction of the articulated pin is parallel to or to a large extent parallel to the support axis. If the first articulated pin and the second articulated pin are oriented relative to each other, the sum of the articulated pin spacing, the first articulated pin length, and the second articulated pin length corresponds to the spacing from the first strut to the second strut.

[0018] When the strut width of at least one of the at least two struts is greater than the articulated pin length of the articulated pin of that strut, the pivot bearing is further stabilized against undesired movements, especially elastic deformations. The strut width should in particular be understood as the extent of the strut in the direction of the main extension direction of the articulated pin of that strut. Particularly advantageously, the strut width is the diameter of the strut in the direction of the support axis.

[0019] If the adapter bottom surface has a pin opening arranged below the articulated pin, and the pin opening has an opening length greater than the length of the articulated pin, the advantage is that the wiper arm can be installed on the pivot bearing particularly simply. Through the pin opening, the elasticity deformability of the strut in the direction outward against the orientation of the articulated pin is increased, so that the wiper arm can be simply clamped.

[0020] Particularly advantageous is an adapter unit having a base element and a covering element, wherein the base element is arranged to receive the wiper blade and has a pivot bearing and an adapter bottom surface, wherein the covering element has a windward surface and is configured to be connectable to the base element, and in particular the covering element is configured to be fixedly connectable to the base element, so that the covering element connected to the base element is largely immovable relative to the base element. In this way, a particularly advantageous aerodynamics of the connection area between the adapter unit and the wiper blade can be ensured at each time point of the wiping movement.

[0021] Advantageously, the covering element is integrally formed with the windward surface. Advantageously, the covering element has a coupling element which is arranged to be connected to the base element. Advantageously, the covering element is integrally formed with the coupling element.

[0022] The "base element" should in particular be understood as an adapter which has a contact area with the wiper blade or with a wiper blade component and can be connected to the wiper blade or the wiper blade component, advantageously fixedly connectable, in particular in such a way that the wiper blade is largely immovable relative to the base element in the connected state with the base element. Advantageously, the base element has a receiving element which is arranged to be coupled to the covering element or to the coupling element of the covering element. Advantageously, the wiper blade adapter unit is integrally formed with the contact area and / or the receiving element. It is also conceivable that the base element is integrally formed with the wiper blade or with a wiper blade component. Advantageously, the base element is integrally formed with the pivot bearing. Advantageously, the pivot bearing is configured such that the support axis is arranged perpendicular or largely perpendicular to the wiper arm direction.

[0023] Particularly advantageous is an adapter unit having a wiper arm adapter unit and a wiper blade adapter unit, wherein the wiper blade adapter unit is arranged to receive the wiper blade and has a pivot bearing and an adapter bottom surface, wherein the wiper arm adapter unit is arranged to receive the wiper arm and has a windward surface, and wherein the pivot bearing is arranged to support the wiper arm adapter unit. In this way, a particularly advantageous aerodynamics of the connection area between the adapter unit and the wiper arm can be ensured at each time point of the wiping movement.

[0024] Advantageously, the wiper arm adapter unit is integrally constructed with the windscreen and / or with the pivot bearing. Advantageously, the wiper arm adapter unit can be fixedly connected to the wiper arm, in particular in such a way that the wiper arm is largely immovable relative to the wiper arm adapter unit in the connected state.

[0025] The "wiper blade adapter unit" should in particular be understood as an adapter which has a contact area with the wiper blade or a wiper blade element and can be connected to the wiper blade or a wiper blade element, advantageously fixedly connectable, in particular in such a way that the wiper blade is largely immovable relative to the wiper blade adapter unit in the connected state. Advantageously, the wiper blade adapter unit is integrally constructed with the contact area and / or with the pivot bearing. It is also conceivable to construct the wiper blade adapter unit integrally with the wiper blade or with a wiper blade element. Description of the drawings

[0026] In the drawings, embodiments of the adapter unit according to the invention are shown and are explained in detail in the following description. Shown therein are:

[0027] Figure 1 A wiper device with an adapter unit is shown,

[0028] Figure 2 A sectional view through the adapter unit is shown,

[0029] Figures 3 to 7 and Figure 9 Details and variants of the pivot bearing of the adapter unit are shown, and

[0030] Figure 8 A sectional view of a variant of the adapter unit is shown. Detailed description

[0031] In the different exemplary embodiments, the same components have the same reference signs.

[0032] In Figure 1FIG. 0 schematically shows in a side view a scraping device 10 having an adapter unit 12, a scraping arm 14 and a scraping blade 16. The scraping blade 16 is configured as a flat scraping blade. The scraping blade 16 is provided for cleaning a vehicle glass 18. The adapter unit 12 has a covering element 20. The adapter unit has a base element 22. The scraping arm 16 has a scraping rod 24. In this embodiment, the main longitudinal extension direction of the scraping arm adapter unit is arranged parallel to the scraping arm direction 26. The main longitudinal extension direction of the scraping blade is arranged parallel to the scraping arm direction. In an advantageous variant, the main longitudinal extension direction of the scraping arm adapter unit is arranged at least largely parallel to the scraping arm direction 26. In an advantageous variant, the main longitudinal extension direction of the scraping blade is arranged at least largely parallel to the scraping arm direction. The covering element has a windward surface 28.

[0033] Figure 2 Side view showing the covering element and the base element along the scraping arm direction 26. Figure 2 Is along Figure 1 Cross-sectional view along line ll-ll in FIG. without the scraping arm only. Figure 2 The plane of the figure of FIG. is arranged perpendicular to the scraping arm direction 26. The windward surface 28 encloses a main angle 32 of 35° with the wind inflow direction 30. The main angle is spanned between the wind inflow direction and the tangential plane of the middle normal vector 34 of the windward surface. The tangential plane is perpendicular to Figure 2 the plane of the figure of FIG. or parallel to the scraping arm direction 26 and is represented in Figure 2 FIG. by the cutting degree (Schnittgrad) 35 between the tangential plane and the plane of the figure. The windward surface is convexly configured along the wind inflow direction.

[0034] In a variant of the adapter unit, the windward surface is at least partially convexly configured, especially convexly configured along the wind inflow direction. "The surface of the adapter unit is configured as convex" should be understood in particular as that the surface arches outwards from the adapter unit. In other variants of the adapter unit, the windward surface is at least partially concavely configured, especially concavely configured along the wind inflow direction. "The surface of the adapter unit is configured as concave" should be understood in particular as that the surface arches towards the inside of the adapter unit.

[0035] The base element has a pivot bearing 36 which is provided for pivotally receiving the scraping arm about a support axis 38. The pivot bearing includes a first strut 40. The first strut 40 is the windward strut. The first strut is oriented perpendicular to the adapter bottom surface 44. The pivot bearing includes a second strut 42. The second strut 42 is the leeward strut. The second strut is oriented perpendicular to the adapter bottom surface 44.

[0036] The first strut has a first height 46 of 6 mm. The second strut has a second height 48 of 10 mm. The first height 46 is less than the second height. In a variant, the first height is between 2 mm and 10 mm, preferably between 4 mm and 8 mm. In a variant, the second height is between 6 mm and 14 mm, preferably between 8 mm and 12 mm. Preferably, the first height is less than the second height. The values of the first height and the second height are selected depending on the technical requirements of the adapter unit, in particular depending on the predefined main angle 32.

[0037] The first strut has a first articulated pin 50. The second strut has a second articulated pin 52. The first articulated pin and the second articulated pin are oriented relative to each other. The first articulated pin is arranged parallel to the support axis 38. The second articulated pin is arranged parallel to the support axis 38.

[0038] Figure 3 Detail view of the first strut 40 showing an alternative variant of the adapter unit. Figure 4 Shows from Figure 3 View of the first strut 40 as seen in the direction of arrow IV. Arrow IV is arranged parallel to the support axis. The first articulated pin 50 consists integrally of a first cylinder 54 and a half hollow frustum section 56. The half hollow frustum section 56 is arranged on the lower side of the pin facing the adapter bottom surface 44. The half hollow frustum section 56 is arranged on the first strut 40 with the wider end. The first articulated pin has a first pin radius 58 of 2 mm. The first pin radius is the radius of the first cylinder 54. The first articulated pin has the first pin radius on the upper side of the pin facing away from the mating bottom surface. Due to the half hollow frustum section 56, the first pin has a second pin radius 60 of 3 mm on the lower side of the pin on the first strut. The first cylinder or the first articulated pin has a first articulated pin length 62 of 4 mm. The half hollow frustum section 56 has a hollow frustum section length 64 of 1 mm. Other dimensions of the first articulated pin can also be considered, depending on the technical requirements. The first articulated pin length can in particular be between 1 mm and 6 mm, preferably between 2 mm and 5 mm, particularly preferably between 3 mm and 4 mm. The first pin radius can be between 1 mm and 6 mm, preferably between 2 mm and 5 mm, particularly preferably between 3 mm and 4 mm. Figure 5 Shows a view of the first strut as seen from above along the Figure 3 direction of arrow V in Figure 6 Arrow V is arranged perpendicular to the adapter bottom surface. Figure 3 View of the first strut as seen in the direction of arrow VI in

[0039] Figure 7 The pivot bearing 36 showing an alternative variant of the adapter unit. The first hinge pin and the second hinge pin have a hinge pin spacing 68 of 6 mm. The first hinge pin has a first hinge pin length 62 of 2 mm. The second hinge pin has a second hinge pin length 70 of 3 mm. The sum of the first hinge pin length and the second hinge pin length is less than the hinge pin spacing.

[0040] The first strut width 72 of the first strut 40 is 5 mm. The first strut width 72 is greater than the first hinge pin length 62. The first strut width 72 is arranged parallel to the support axis. The second strut width 74 of the second strut 42 is 4 mm. The second strut width 74 is greater than the first hinge pin length 70. The second strut width 74 is arranged parallel to the support axis.

[0041] The adapter bottom surface 44 has a first pin opening 76 below the first hinge pin. The first pin opening has a first opening length 78 of 3.5 mm. The first opening length is greater than the first hinge pin length. The first opening length is oriented parallel to the support axis.

[0042] The adapter bottom surface 44 has a second pin opening 80 below the second hinge pin. The second pin opening has a second opening length 82 of 3.5 mm. The second opening length is greater than the second hinge pin length. The second opening length is oriented parallel to the support axis.

[0043] Preferably, one of the pin openings has an opening width arranged parallel to the adapter bottom surface and perpendicular to the support axis, and the opening width is greater than the maximum pin radius of the hinge pin arranged thereon. Preferably, the pin openings are dimensioned such that the vertical projection of the hinge pin onto the adapter bottom surface is completely located inside the pin openings.

[0044] In this embodiment, the covering element 20 can be fixedly connected to the base element 22 by a locking connection (not shown). The covering element connected to the base element is largely immovable relative to the base element. The base element 22 has a pivot bearing 36. The covering element covers the pivot bearing. The pivot bearing is arranged for coupling to the scraping arm so that the scraping arm can pivot or rotate about the support axis 38 (see Figure 2 ). The support axis 38 is oriented parallel to the air inflow direction 30 in this embodiment. The base element 22 is arranged for receiving the scraping blade 16 by a plug connection (not shown).

[0045] Figure 8A cross-section perpendicular to the direction 26 of the wiper arm showing an alternative embodiment of the adapter unit. The adapter unit 12 has a wiper arm adapter unit 84. The wiper arm adapter unit has a windward surface 28. The wiper arm adapter unit has a wiper arm opening 86 provided for receiving the wiper arm. The wiper arm opening is an opening for receiving a receiving channel into which the wiper arm can be introduced. The receiving channel extends largely parallel to the wiper arm direction. The wiper arm adapter unit has a fixing mechanism (not shown in this embodiment) provided for releasably coupling the wiper arm to the wiper arm adapter unit. In the coupled state, the wiper arm is fixedly connected to the wiper arm adapter unit. In the state of connection with the wiper arm adapter unit, the wiper arm is largely immovable relative to the wiper arm adapter unit. The wiper arm adapter unit 84 has a connecting element 88 provided for pivotably coupling with the wiper blade adapter unit 90 about a support axis 38. The wiper blade adapter unit 90 is provided for receiving the wiper blade 16. The wiper blade adapter unit 90 has a pivot bearing 36. The pivot bearing includes a first strut 40 and a second strut 42.

[0046] The connecting element has two plates 92 arranged parallel to each other. The plates 92 have a spacing relative to each other which is shorter than half of the length of the hinge pin (the shorter of the two hinge pins) from the first strut to the second strut. In this way, the plates are matched between the two struts. Each plate has a largely circular opening configured for receiving the hinge pin. The plates 92 are elastically configured and can be elastically deflected relative to each other. In this way, the connecting element can be snapped into the pivot bearing. When the wiper arm adapter unit is mounted on the wiper blade adapter unit, these plates are introduced into the inner region between the struts and elastically move relative to each other. During the introduction, the openings of the plates each receive a hinge pin and the plates are elastically oriented parallel to each other.

[0047] Figure 9 A favorable variant of the pivot bearing is shown. The hinge pins each have an inclined portion 94 on their upper side. The inclined portion encloses an inclined angle of 20° with the normal of the adapter bottom surface. In the variant, the inclined angle is between 5° and 45°, preferably between 15° and 35°, and particularly preferably between 25° and 30°. In other variants, at least one inclined portion is provided at least locally on the outer surface 98 of the hinge pin. In a preferred variant, the length of the hinge pin at least locally decreases with the increase of the spacing from the adapter bottom surface.

[0048] In an advantageous embodiment, the windward surface 28 has a modified or special surface structure. The surface can be roughened at least locally and / or have a sharkskin structure and / or have a golf ball structure. Such a surface structure influences the air flow passing over it. In this way, the aerodynamic properties of the windward surface can be improved. In particular, the pressing force acting through the windward surface can be precisely adjusted by choosing the type and arrangement of the modified surface structure.

Claims

1. An adapter unit is provided for coupling a wiper blade to a wiper arm. The adapter unit has a windward surface which is provided for blocking the inflowing air and pressing the wiper blade against the vehicle glass, and the adapter unit has a pivot bearing which is provided for pivotally supporting the wiper arm relative to the wiper blade, wherein, The pivot bearing has at least two struts arranged vertically on the bottom surface of the adapter, wherein each of the struts has a hinge pin respectively, the hinge pin is oriented parallel to the support axis and is provided for supporting the scraping arm and / or the scraping arm adapter unit, wherein the windward strut of the at least two struts has a smaller height than the leeward strut of the at least two struts, and the hinge pin has a larger pin radius on the pin lower side facing the bottom surface of the adapter than on the pin upper side facing away from the bottom surface of the adapter.

2. The adapter unit according to claim 1, characterized in that, The windward surface and the support axis enclose a main angle between 25° and 65°.

3. The adapter unit according to claim 1 or 2, characterized in that, The at least two struts have a plurality of ribs provided for strengthening the struts.

4. The adapter unit according to claim 1 or 2, characterized in that, The hinge pins of the at least two struts are oriented relative to each other.

5. The adapter unit according to claim 1 or 2, characterized in that, The hinge pin spacing from the first hinge pin to the second hinge pin is greater than the sum of the first hinge pin length of the first hinge pin and the second hinge pin length of the second hinge pin.

6. The adapter unit according to claim 1 or 2, characterized in that The strut width of one of the at least two struts is greater than the hinge pin length of the hinge pin of the strut.

7. The adapter unit according to claim 1 or 2, characterized in that, The bottom surface of the adapter has a pin opening arranged below the hinge pin, and the pin opening has an opening length greater than the hinge pin length.

8. The adapter unit according to claim 1 or 2, characterized in that A base element and a covering element, wherein the base element is provided for accommodating the wiper blade and has the pivot bearing and the bottom surface of the adapter, and the covering element has a windward surface and is configured to be connectable to the base element.

9. The adapter unit according to claim 1 or 2, characterized in that A scraping arm adapter unit and a scraping blade adapter unit, wherein the scraping blade adapter unit is provided for accommodating the scraping blade and has a pivot bearing and the bottom surface of the adapter, and the scraping arm adapter unit is provided for accommodating the scraping arm and has a windward surface, and the pivot bearing is provided for supporting the scraping arm adapter unit.

10. The adapter unit according to claim 1, characterized in that, The adapter unit is provided for releasably coupling the wiper blade to the scraping arm.

11. The adapter unit according to claim 2, characterized in that, The windward surface and the support axis enclose a main angle between 40° and 50°.

12. The adapter unit according to claim 1, characterized in that, The height of the at least two struts corresponds to the height profile of the windward surface.

13. The adapter unit according to claim 8, wherein The covering element is configured to be fixedly connectable to the base element so that the covering element connected to the base element cannot move relative to the base element.

14. The adapter unit according to claim 3, characterized in that, The ribs are arranged on the side of the strut opposite to the hinge pin.

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