CN117125026A - Windshield wiper assembly, windshield wiper system and vehicle - Google Patents

Abstract

The invention relates to a windscreen wiper assembly (1), a windscreen wiper system and a vehicle, said windscreen wiper assembly (1) comprising: -a main arm (10) configured to reciprocate about a rotation axis (D), the main arm (10) comprising opposite first (11) and second (12) ends, the first end (11) being connected to a first wiper blade (20), the second end (12) being connected to a drive; and a secondary arm (30) configured to reciprocate about the rotation axis (D), the secondary arm (30) comprising opposite third (31) and fourth (32) ends, the third end (31) being connected to a second wiper blade (40), the second wiper blade (40) being closer to the rotation axis (D) than the first wiper blade (20), wherein the fourth end (32) of the secondary arm (30) is connected with the driver.

Description

Windshield wiper assembly, windshield wiper system and vehicle

Technical Field

The present invention relates to a windshield wiper assembly, a windshield wiper system comprising the windshield wiper assembly, and a vehicle comprising the windshield wiper system.

Background

Wiping systems for the windscreen of a motor vehicle are commonly referred to as windscreen wiping systems, which are designed to remove, by wiping, liquids and grime that may interfere with the view of the driver of the motor vehicle to his or her surroundings. These windscreen wipers generally comprise a drive arm which performs an angular reciprocal movement about an axis of rotation, and an elongated wiper blade which is equipped with a doctor blade made of elastomeric material. The doctor blade wipes off water and a quantity of dirt and grime by rubbing against the front or rear glass surface of the motor vehicle, removing it from the driver's view.

The current growing number of vehicles are designed with very large glass, and expanding the wiping area of the wiper blade presents a significant challenge for the windshield wiping system, as a larger wiping area means a longer arm and longer wiper blade, which results in a greater drive (e.g., motor) torque demand.

Accordingly, there is a need for a windshield wiper assembly that covers as large a wiping area as possible with limited drive torque.

Disclosure of Invention

In response to the above-mentioned problems and needs, the present invention is directed to a new windshield wiper assembly, a windshield wiper system, and a vehicle that solve the above-mentioned problems, and provide other technical effects, by adopting the following technical features.

In one aspect, the present invention provides a windshield wiper assembly comprising: a main arm configured to reciprocate about an axis of rotation, the main arm including opposed first and second ends, the first end being connected to a first wiper blade and the second end being connected to a driver; and a secondary arm configured to reciprocate about the axis of rotation, the secondary arm including opposed third and fourth ends, the third end being connected to a second wiper blade, the second wiper blade being closer to the axis of rotation than the first wiper blade, the fourth end of the secondary arm being connected to the driver.

The main arm, also called a drive arm, is directly connected to a drive (e.g., to a drive shaft of the drive) of the windshield wiping system to receive a drive torque for angular reciprocal movement about an axis of rotation. One solution that is easy to think for the application needs of larger windshields is to increase the length of the main arm and the wiper blade connected to the main arm to cover a larger wiping area. However, the drawbacks of this solution are apparent in that the increase in length of the main arm and wiper blade directly results in an increase in friction resistance moment of the wiper blade in contact with the windshield, and therefore the margin of increase in length of the main arm and wiper blade is limited at a limited driving torque. The length of the wiper blade attached to the main arm is typically no more than one meter.

According to the above feature of the present invention, the present invention provides the sub-arm coaxially rotated with the main arm and the second wiper blade connected to the sub-arm, the second wiper blade being closer to the rotation axis, thereby being capable of covering the remaining area of the tip of the first wiper blade. It is therefore an object of the present invention to provide a coaxially arranged main arm and auxiliary arm, and a respective first wiper blade and second wiper blade, which can cover a very large wiping area and require a small driving torque, for the application requirements of larger windshields. Furthermore, the main arm and the sub-arm are disposed around the same rotation axis and driven by the same driver, and the existing windshield wiping system can be utilized to the maximum extent, and the arrangement of the respective rotation axes relative to the main arm and the sub-arm, respectively, does not affect the arrangement of the existing windshield wiping system, and thus has good compatibility.

Alternatively, the windshield wiper assembly may be positioned on the driver's side to provide a greater wiping range for the driver and thus a greater visual range in rainy, snowy, and like weather conditions.

In some examples, the fourth end of the secondary arm is rotationally fixedly connected to the second end of the primary arm.

In some examples, the second end of the primary arm includes a receiving groove and a first anti-rotation feature disposed on an inner wall of the receiving groove, the fourth end of the secondary arm includes a second anti-rotation feature that mates with the first anti-rotation feature, the fourth end of the secondary arm is received within the receiving groove, and the first anti-rotation feature mates with the second anti-rotation feature such that the fourth end is rotationally fixed with the second end.

The above example shows one embodiment of the primary and secondary arms being rotationally fixed at the second and fourth ends by cooperating anti-rotation features. The main arm and the auxiliary arm can be manufactured separately, and the influence on the existing process and production line is very small, because only the design of the element at the second end of the main arm is required to be changed, and the rest elements can be consistent with the original process and production line.

In some examples, the first rotation-stopping feature comprises one of a groove or a protrusion and the second rotation-stopping feature comprises the other of a groove or a protrusion.

In some examples, the secondary arm is integrally formed with, i.e., integrated as one piece with, the primary arm. For example, in embodiments in which the main arm includes a main arm head and a main arm body, and the sub-arm includes a sub-arm head and a sub-arm body, the main arm, or the main arm head as a component of the second end, may be integrally formed with the sub-arm head as a component of the fourth end, as one component.

In some examples, the second wiper blade at least partially overlaps the first wiper blade in a radial direction relative to the rotational axis.

Based on the above features, the second wiper blade at least partially overlaps the first wiper blade in the radial direction, so that the respective wiping areas also at least partially overlap, so that no dead angle and no wiping area exists in the enlarged wiping area. Furthermore, the windshield wiper assembly according to the present invention allows the first wiper blade and the second wiper blade to contact the surface of the windshield in an optimal state even if the surface to be wiped is relatively large and curved, which prevents the generation of uneven wiping and non-wiping areas.

In some examples, the length of the second wiper blade is less than the length of the first wiper blade.

A relatively small driving torque is another object of the present invention, since the sub-arm and the second wiper blade require only a short length, the load increase of the entire driving system is small, and a larger wiping area can be achieved with only a small load.

In some examples, the main arm includes a main arm head and a main arm body, the main arm head being pivotally connected to the main arm body.

The construction of the main arm generally includes a main arm head connected to the drive shaft and a main arm body connected to the first wiper blade, the pivotal connection between the main arm head and the main arm body being achieved by mating features such as dowel pin holes. In addition, a biasing spring may be included between the main arm head and the main arm body to apply a biasing force to the main arm body toward the windshield surface to ensure effective contact of the first wiper blade with the windshield surface.

In some examples, the secondary arm includes a secondary arm head and a secondary arm body, the secondary arm head being pivotally connected to the secondary arm body.

Similarly, the secondary arm may also be of similar construction to the primary arm, with the only difference being that the secondary arm is of a smaller length than the primary arm.

In some examples, the secondary arm head is integrally formed with the primary arm.

In some examples, the sub-arm head is L-shaped. This L-shape of the sub-arm head allows the sub-arm body to be offset from the main arm body and remain substantially parallel or at a small angle to each other such that the sub-arm body and the main arm body rotate substantially parallel to each other and the gap between the sub-arm body and the main arm body is small, thus the line of sight obstruction to passengers in the vehicle is also small.

In yet another aspect, the present invention also proposes a windshield wiping system comprising a drive and a windshield wiping assembly as previously described, said windshield wiping assembly being connected to said drive.

In some examples, the drive includes a drive shaft to which the windshield wiper assembly is rotationally fixed.

In some examples, a portion of the drive shaft has a truncated cone and another portion of the drive shaft is threaded, the primary arm is sleeved on the truncated cone, and the primary arm is pressed against the truncated cone by a nut to rotationally fix with the drive shaft.

In some examples, the secondary arm is sleeved to the drive shaft and disposed between the primary arm and the nut.

According to the characteristics, the auxiliary arm is rotationally fixed on the head of the main arm through the rotation stopping characteristic part and is fastened on the driving shaft by only one nut, so that the structure is simple, and the manufacturing cost is low.

In another aspect, the present invention also provides a vehicle comprising a windshield wiping system as described above.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following brief description of the drawings of the embodiments will make it apparent that the drawings in the following description relate only to some embodiments of the present invention and are not limiting of the present invention.

FIG. 1 illustrates a perspective view of a windshield wiper assembly according to at least one embodiment of the present disclosure;

FIG. 2 illustrates a top view of the windshield wiper assembly of FIG. 1;

FIG. 3 illustrates a schematic view of a wiping area of a windshield wiper assembly in accordance with at least one embodiment of the present disclosure;

FIG. 4 shows a bottom view of the windshield wiper assembly of FIG. 1;

FIG. 5 illustrates a partial view of a windshield wiping system in accordance with at least one embodiment of the present disclosure;

fig. 6 shows a cross-sectional view of fig. 5 taken along line A-A.

List of reference numerals

1. 2 windshield wiper assembly

10. Main arm

11. First end

12. Second end

13. Main arm body

14. Main arm head

15. First rotation stop feature

20. First wiper blade

30. Auxiliary arm

31. Third end

32. Fourth end

33. Auxiliary arm body

34. Auxiliary arm head

35. Second anti-rotation feature

40. Second wiper blade

3. Driving shaft

4. First pin

5. Bias spring

6. Second pin

7. Nut

8. Receiving groove

91. First part

W windshield glass

P1 first wiping area

P2 second wiping area

OP overlap region

D axis of rotation

X1 first pivot axis

X2 second pivot axis

Detailed Description

In order to make the objects, technical solutions and advantages of the technical solutions of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted.

Possible embodiments within the scope of the invention may have fewer components, have other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. than the examples shown in the drawings. Furthermore, two or more of the elements in the figures may be implemented in a single element or the single element shown in the figures may be implemented as multiple separate elements without departing from the concepts of the present invention.

It should be noted that a windshield wiper system typically includes a driver and a windshield wiper assembly that is connected to the driver. In particular, the driver may comprise a drive shaft to which the windscreen wiper assembly is rotationally fixed. The drive shaft is connected to an output shaft of a drive (e.g., a drive motor) to apply a drive torque to the windshield wiper assembly such that the windshield wiper assembly performs an angular reciprocating motion about an axis of rotation.

As shown in fig. 1 and 2, a windshield wiper assembly 1 according to at least one embodiment of the present disclosure includes a main arm 10, a first wiper blade 20, a sub-arm 30, and a second wiper blade 40 assembled to form an assembly unit.

Specifically, the main arm 10 includes a main arm head 14 and a main arm body 13, each of the main arm head 14 and the main arm body 13 being substantially bar-shaped, the main arm head 14 and the main arm body 13 being pivotally connected by a mating feature such as a pin-hole, so that the main arm body 13 can pivot with respect to the main arm body 13 about a first pivot axis X1 shown in fig. 2. The first pivot axis X1 is, for example, perpendicular to the length direction of the main arm head 14 and the main arm body 13. The main arm 10 includes first and second opposite ends 11, 12 along its length. For example, the first end 11 is an end of the main arm body 13 remote from the first pivot axis X1, the second end 12 is an end of the main arm head 14 remote from the first pivot axis X1, the first wiper blade 20 is connected to the first end 11 by a connecting means, and the second end 12 is rotationally fixed to the drive shaft 3 of the driver to receive a driving torque from the drive shaft 3, so that the main arm 10 can rotate about the rotation axis D.

The connection means between the first wiper blade 20 and the main arm body 13 are well known, and the structure thereof will not be described in detail in the present disclosure. Furthermore, the first wiper blade 20 may generally comprise a blade in direct contact with the windscreen surface and a holder for receiving and supporting the blade.

The sub arm 30 includes a sub arm head 34 and a sub arm body 33, the sub arm head 34 is L-shaped, and the sub arm body 33 is substantially bar-shaped. As shown in fig. 2, the sub arm 30 is disposed below the main arm 10, i.e., in a direction closer to the hood of the vehicle. The pivotal connection between the sub-arm head 34 and the sub-arm body 33 is also achieved by cooperating features such as dowel pin holes, enabling the sub-arm body 33 to pivot relative to the sub-arm head 34 about the second pivot axis X2 shown in fig. 2. The secondary arm 33 may be perpendicular to the second pivot axis X2, and the first pivot axis X1 and the second pivot axis X2 may be substantially parallel, or at a small angle, such as shown in fig. 2. Therefore, the sub arm 33 and the main arm 13 can rotate substantially parallel to each other, and the gap between the sub arm 33 and the main arm 13 is small, so that the shielding of the sight line of the occupant in the vehicle is also small.

The secondary arm 30 includes opposed third 31 and fourth 32 ends. For example, the third end 31 is an end of the sub-arm body 33 remote from the second pivot axis X2, the fourth end 32 is an end of the sub-arm head 34 remote from the second pivot axis X2, the second wiper blade 40 is connected to the third end 31 by a connecting means, and the fourth end 32 is rotationally fixed to the second end 12 of the main arm 10 to receive the driving torque transmitted by the main arm 10 so that the sub-arm 30 can rotate around the same rotation axis D together with the main arm 10. In other words, the sub arm 30 is disposed coaxially with the main arm 10.

In order to cover as large a wiping area as possible of the windscreen wiper assembly 1, the second wiper blade 40 is arranged closer to the rotational axis D with respect to the first wiper blade 20, thereby complementing the wiping-free area between the first wiper blade 20 and the rotational axis D. This arrangement is advantageous because for larger area windshields, the predetermined large wiping area is covered by only one wiper blade, with the following difficulties: firstly, the surface of the windshield is usually a surface with radians, and one wiper blade is difficult to completely fit the whole wiping area, so that the wiping effect is poor at the positions of the surface of the windshield which is not completely fit or is not fit; secondly, a long wiper blade causes an increase in friction torque, thus requiring an increase in driving torque of the driving motor, which requires a corresponding increase in size and power of the driving motor of the vehicle, thus causing an increase in manufacturing cost. The present disclosure therefore proposes to add, on the basis of the main arm of the windscreen wiper assembly, a set of auxiliary arms which can compensate for the non-wiping area between the first wiper blade 20 and the rotation axis D, thus enlarging the wiping area. Such a covering of the non-wiped area is also advantageous, in particular for the driver side, in that the visibility of the driver's view on the vehicle's proximal side can be improved.

In the present embodiment, accordingly, the length of the second wiper blade 40 may be smaller than the length of the first wiper blade 20. Therefore, the load increase of the entire drive system is small, and a larger wiping area can be realized with only a small load. Alternatively, the length of the secondary arm 30 may be less than the length of the primary arm 10.

The above shows an example in which the second end 12 of the main arm 10 and the fourth end 34 of the auxiliary arm 30 are connected to a driver. In this embodiment, the second end 12 of the main arm 10 is rotationally fixedly connected to the drive shaft 3 of the drive, and the second end 12 of the main arm 10 and the fourth end 34 of the auxiliary arm 30 are rotationally fixedly connected, whereby the auxiliary arm 30 is indirectly connected to the drive. Other contemplated embodiments are possible, for example, where the second end 12 of the main arm 10 and the fourth end 34 of the auxiliary arm 30 are each directly connected to the actuator.

For another example, the main arm 10 may be integrally formed with the sub-arm 30 so as to be integrally connected to the driver.

In alternative embodiments, the secondary arm head 34 may be integrally formed with the primary arm 10, thereby forming one piece. This arrangement can simplify the assembly and the main arm 10 and the sub-arm head 34 as a whole can be directly mounted to the drive shaft 3 by the nut 7. Specifically, the secondary arm head 34 may be integrally formed with the primary arm head 14.

Fig. 3 shows a schematic view of a wiping area of a windshield wiper assembly 1 in accordance with at least one embodiment of the present disclosure. As shown in fig. 3, the second wiper blade 40 at least partially overlaps the first wiper blade 20 in a radial direction with respect to the rotation axis D. Accordingly, the first wiping area P1 formed by the first wiper blade 20 and the second wiping area P2 formed by the second wiper blade 40 overlap each other at the respective ends of the areas, thereby creating an overlap area OP. The overlap region OP is such that no dead angle and no wiping-free region exists in the enlarged wiping region. Further, even if the surface to be wiped is relatively large and has a curved surface, the first wiper blade 20 and the second wiper blade 40 can contact the surface of the windshield W in an optimal state, which prevents the generation of uneven wiping and non-wiping areas.

Fig. 3 also schematically illustrates another windshield wiper assembly 2, the windshield wiper assembly 2 comprising only a primary arm and no secondary arm. A third wiping area P3 may be formed by the main arm of the windshield wiper assembly 2. As can be seen from fig. 3, the area of the third wiping area P3 formed by the windshield wiper assembly 2 is smaller than the sum of the areas of the first wiping area P1 and the second wiping area P2 of the windshield wiper assembly 1 due to the lack of the auxiliary arm. The windscreen wiper assembly 1 is arranged on the driver side and the windscreen wiper assembly 2 is arranged on the co-driver side, which is advantageous for improving the larger wiping field of view of the driver. Alternatively, if desired, the windshield wiper assembly 2 may also have a sub-arm structure similar to the windshield wiper assembly 1, thereby providing a greater wiping field of view for both the driver and the co-pilot's passengers.

Fig. 4 shows a bottom view of the windshield wiper assembly 1 of the embodiment shown in fig. 1. As shown in fig. 4, the first pin 4 is provided between the main arm head 14 and the main arm body 13, so that the main arm body 13 can pivot with respect to the main arm body 13 about the first pivot axis X1 shown in fig. 2. The second pin 6 is provided between the sub-arm head 34 and the sub-arm body 33, so that the sub-arm body 33 can pivot about the second pivot axis X2 with respect to the sub-arm head 34. In the present embodiment, a biasing spring 5 is further provided between the main arm head 14 and the main arm body 13, one end of which is connected to the main arm head 14 and the other end of which is connected to the main arm body 13 to apply a biasing force to the main arm body 13 toward the surface of the windshield W. Similarly, a biasing spring may be provided between the sub arm body 33 and the sub arm head 34, which is omitted from fig. 4 for brevity.

The windshield wiping system of at least one embodiment of the present disclosure will be described below with reference to fig. 5 and 6, and the rotationally fixed connection between the main arm 10 and the auxiliary arm 30 will be specifically described with reference to the drawings. For the sake of brevity, the cross-sectional view of FIG. 6 does not provide a section line.

A windshield wiper system according to at least one embodiment of the present disclosure includes a driver (not shown) and a windshield wiper assembly 1 as previously described, the windshield wiper assembly (1) being connected to the driver. Specifically, the driver may include a drive shaft 3 for outputting a driving torque. The first portion 91 of the drive shaft 3 has a truncated cone with a diameter that gradually decreases from bottom to top. The portion of the drive shaft 3 opposite the first portion 91 is provided with threads, and a main arm 10 (specifically a main arm head 14) is fitted over the truncated cone, the main arm 10 being pressed against the truncated cone by the nut 7 to be rotationally fixed with the drive shaft 3.

The secondary arm 30 is rotationally fixed to the primary arm 10 by a rotation stop feature. In the exemplary embodiment shown in fig. 5 and 6, the second end 12 of the main arm 10 (i.e., the main arm head 14) may include a receiving slot 8 and a first anti-rotation feature 15 disposed on an inner wall of the receiving slot 8. The receiving slot 8 has an opening to accommodate the sub-arm 30, i.e., the sub-arm head 34. The receiving slot 8 may extend to a side wall of the main arm head 14 to allow the auxiliary arm head 34 to pass through the side wall. When mounted, the sub-arm 30 is inserted into the receiving groove 8 in the direction of the rotation axis D.

To limit relative rotation between the main arm 10 and the auxiliary arm 30, the fourth end 32 of the auxiliary arm 30 (i.e., the auxiliary arm head 34) includes a second rotation-stopping feature 35 that mates with the first rotation-stopping feature 15. The first rotation stop feature 15 cooperates with the second rotation stop feature 35 to rotationally fix the main arm 10 and the auxiliary arm 30. The sub-arm head 34 may have a through hole through which the drive shaft 3 passes, so that the sub-arm 10 may be sleeved to the drive shaft 3. In this embodiment, the first rotation stopping feature 15 is three protrusions circumferentially distributed on the inner wall of the receiving groove 8 and protruding inward from the inner wall of the receiving groove 8, respectively, and the second rotation stopping feature 35 is three grooves that cooperate with the protrusions. The three protrusions cooperate with the three grooves, respectively, to rotationally fix the fourth end 32 of the secondary arm 10 with the primary arm 10.

After the sub-arm 30 is mounted to the receiving groove 8, the driving shaft 3 is also passed through the through hole of the sub-arm head 34 and protruded at this time, and the screw thread of the driving shaft 3 is protruded at this time, and thus the nut 7 may be mounted to fasten the main arm 10 and clamp the sub-arm 30 between the main arm 10 and the nut 7.

In embodiments where the secondary arm head 34 is integrally formed with the primary arm head 14, the primary arm head 14 and secondary arm head 34 as a unit may be mounted directly to the drive shaft 3 by the nut 7 without the need for a rotation stopping feature.

At least one embodiment of the present disclosure also provides a vehicle including a windshield wiping system as previously described.

The exemplary embodiments of the windshield wiper assembly, the windshield wiper system, and the vehicle set forth herein have been described in detail with reference to preferred embodiments, however, it will be appreciated by those skilled in the art that numerous variations and modifications may be made to the specific embodiments described above without departing from the inventive concepts. In addition, various technical features and structures presented in various aspects of the present invention may be combined in various ways without departing from the scope of the invention, which is defined by the appended claims.

Claims (16)

1. A windshield wiper assembly (1) comprising:

-a main arm (10) configured to reciprocate about a rotation axis (D), the main arm (10) comprising opposite first (11) and second (12) ends, the first end (11) being connected to a first wiper blade (20), the second end (12) being connected to a drive; and

a secondary arm (30) configured to reciprocate about the rotational axis (D), the secondary arm (30) comprising opposite third (31) and fourth (32) ends, the third end (31) being connected to a second wiper blade (40), the second wiper blade (40) being closer to the rotational axis (D) than the first wiper blade (20),

wherein the fourth end (32) of the secondary arm (30) is connected to the driver.

2. The windscreen wiper assembly (1) as set forth in claim 1 wherein said fourth end (32) of said secondary arm (30) is rotationally fixedly connected to said second end (12) of said primary arm (10).

3. The windshield wiper assembly (1) as set forth in claim 2 wherein said second end (12) of said primary arm (10) includes a receiving slot (8) and a first anti-rotation feature (15) disposed on an inner wall of said receiving slot (8), said fourth end (32) of said secondary arm (30) includes a second anti-rotation feature (35) that mates with said first anti-rotation feature (15), said fourth end (32) of said secondary arm (30) is received within said receiving slot (8), said first anti-rotation feature (15) mates with said second anti-rotation feature (35) such that said fourth end (32) is rotationally fixed with said second end (12).

4. A windscreen wiper assembly (1) according to claim 3, wherein said first rotation stop feature (15) comprises one of a groove or a protrusion and said second rotation stop feature (35) comprises the other of a groove or a protrusion.

5. The windshield wiper assembly (1) as set forth in claim 1 wherein said secondary arm (30) is integrally formed with said primary arm (10).

6. The windscreen wiper assembly (1) according to claim 1, wherein said second wiper blade (40) at least partially overlaps said first wiper blade (20) in a radial direction with respect to said axis of rotation (D).

7. The windshield wiper assembly (1) as set forth in claim 1 wherein said second wiper blade (40) has a length that is less than a length of said first wiper blade (20).

8. The windscreen wiper assembly (1) according to any of the claims 1 to 7 wherein said main arm (10) comprises a main arm head (14) and a main arm body (13), said main arm head (14) being pivotally connected with said main arm body (13).

9. The windshield wiper assembly (1) as set forth in any one of claims 1-7 wherein said secondary arm (30) comprises a secondary arm head (34) and a secondary arm body (33), said secondary arm head (34) being pivotally connected to said secondary arm body (33).

10. The windshield wiper assembly (1) as set forth in claim 9 wherein said secondary arm head (34) is integrally formed with said primary arm (10).

11. The windshield wiper assembly (1) as set forth in claim 9 wherein said sub-arm head (34) is L-shaped.

12. A windscreen wiper system comprising a drive and a windscreen wiper assembly (1) according to any of the claims 1 to 11, said windscreen wiper assembly (1) being connected to said drive.

13. The windscreen wiper system according to claim 12, wherein said drive comprises a drive shaft (3), said windscreen wiper assembly (1) being rotationally fixed to said drive shaft (3).

14. The windscreen wiper system according to claim 13, wherein a portion of said drive shaft (3) has a truncated cone, another portion of said drive shaft (3) being threaded, said main arm (10) being sleeved on said truncated cone, said main arm (10) being pressed against said truncated cone by means of a nut (7) to be rotationally fixed with said drive shaft (3).

15. The windscreen wiper system according to claim 14, wherein said secondary arm (30) is sleeved to said drive shaft (3) and is arranged between said primary arm (10) and said nut (7).

16. A vehicle comprising a windshield wiping system according to any one of claims 12 to 15.