Wiping device and sensor system thus equipped

Abstract

TITLE: Wiping device and sensor system thus equipped. Wiping device (10a) comprising a wiping unit (18a) having at least one wiping arm (20a) and a wiping lip (22a) for the outer surface (16a) of the protective element (14a) of the sensor device (12a). The wiping lip (22a) is coupled to the wiping arm (20a). An aerodynamic thrust element (24a), connected to the wiping arm (20a), comprising an active aerodynamic surface (26a, 26a) inclined relative to the outer surface (16a) of the protective element (14a) and generating a thrust force (48a) through the air stream to press the wiping lip (22a) against the outer surface (16a) of the protective element (14a). Figure 4

Description

Title of the invention: Wiping device and sensor system equipped therewith FIELD OF THE INVENTION

[0001] The present invention relates to a wiping device comprising a wiping unit having a wiping arm and a wiping lip for wiping the outer surface of a protective element of a sensor device. STATE OF THE ART

[0002] Such a wiping device is already known, comprising a wiping unit with a wiping arm and a wiping lip for wiping the outer surface of an element protecting a sensor device. The sensor device is in particular a lidar device and the wiping lip is coupled to the wiping arm.

[0003] DISCLOSURE AND ADVANTAGES OF THE INVENTION

[0004] The subject of the invention is a wiping device comprising at least one wiping unit having at least one wiping arm and at least one wiping lip for wiping an outer surface of a protective element of a sensor device, in particular a lidar device, the wiping lip being coupled to the wiping arm, this wiping device being characterized by at least one aerodynamic thrust element connected to the wiping arm having an active aerodynamic surface inclined relative to the outer surface of the protective element and which generates a thrust force by the air stream to press the wiping lip against the outer surface of the protective element.

[0005] The expression "wiping device" preferably designates at least one part, in particular a subassembly of a windshield wiper. Preferably, the wiping device is also the entire windshield wiper and in particular with a wiper blade. The wiping device is applied to a vehicle and to its sensor device. The windshield wiper device and in particular a part of the windshield wiper are used to clean the surface, which is preferably a window, of the sensor device fitted to the vehicle.

[0006] The wiping device is coupled to the vehicle.

[0007] The expression "intended for" means that it is a means essentially made, installed, designed or equipped to perform a certain function. The fact of performing a certain function means that the object performs this function in at least one state of application or operation. The operating state designates a state in which the wiping device is ready to perform a wiping operation or is already in wiping mode or will be in wiping mode to wipe with the wiping lip the wiping unit which is preferably a window, in particular the outer surface of the protective element of the sensor device being applied against this outer surface. The outer surface of the protective element of the sensor device may be a part of a window of the vehicle. In particular, the protective element is constituted by a part of the window of the vehicle.

[0008] The sensor device is preferably implemented as a lidar device. The sensor device is in particular at least one part, preferably at least one subassembly, of at least one lidar sensor, in particular a lidar sensor module. The sensor device may in particular be the entire lidar sensor subassembly. Preferably, the sensor device comprises a lidar unit which comprises a lidar sensor element. The sensor device may comprise several, for example two, three, four, five or more lidar sensor elements. The sensor device equips a vehicle to capture its environment in particular to enable autonomous driving. The sensor device can be used on construction sites to measure or survey buildings, to scan 3D contours or in the laboratory for research purposes.

[0009] In particular, the sensor device and in particular at least one of the lidar sensor elements, makes it possible to capture or measure objects. The sensor device is preferably applied to a vehicle and thus the sensor device is a component of the vehicle. Alternatively, the sensor device is retrofitted to the vehicle. Preferably, the sensor device makes it possible to capture objects in the environment of the vehicle. It captures objects in particular, preferably in the region of the roof or the frontal region or on at least one side and / or in the rear part of the vehicle to which it is coupled.

[0010] The sensor device is connected to the vehicle, in particular to its computing unit such as, for example, the vehicle's on-board computer. The sensor device comprises a protective element, in particular a cover wall transparent to the laser beam, allowing it to exit the housing of the sensor device; this protective device is in particular practically transparent to the detection wavelengths of the laser beam of the lidar sensor element. The protective element is produced in the form of a cover wall.

[0011] The protective element, in particular the cover wall, constitutes for the sensor device, the outer surface of the sensor device as outer surface of the protective element, in particular the cover wall. The sensor device in particular the protective element preferably the cover wall, belong at least in part to the outer side of the protective element, preferably the cover wall protects the sensor device at least in part from the outside. By way of example, the protective element, preferably the cover wall is at least largely made of glass and / or plastic. In particular, the wiping unit is provided for cleaning the protective element, preferably the cover wall, by mechanical action using the wiping lip. The wiping lip is preferably made of a rubbery material.

[0012] The wiping device comprises a drive unit which moves the wiping unit over the outer surface to clean it. The wiping device has a pushing unit for pressing the wiping lip against the outer surface. The drive unit moves the wiping unit along a linear path to clean the outer surface and in particular in a bidirectional movement over the outer surface; in particular, the pushing unit presses the wiping lip against the outer surface.

[0013] The drive unit moves the wiping unit over the entire outer surface, in particular to clean it mechanically. Preferably, the thrust unit has at least one basic thrust element. Preferably, the thrust unit, in particular at least one basic thrust element, exerts a thrust force on the wiping lip to press the surface of the wiping lip along its longitudinal axis against the outer surface.

[0014] Preferably, the thrust unit, in particular the basic thrust element, are designed to exert a minimal thrust force on the wiping lip, in particular to press the wiping lip against the outer surface with a uniform pressure of at least 10 N / m, preferably at least 14 N / m and particularly preferably at least 20 N / m.

[0015] The wiping lip of the wiping unit is advantageously interchangeable. In particular, the wiping lip of the wiping unit can be changed without tools. The term "longitudinal axis" of an object designates an axis parallel to the longest edge of the smallest geometric parallelepiped closely surrounding the object and preferably passing through the geometric center of the object.

[0016] The thrust unit is preferably different from an elastic rail. The thrust unit is designed to exert a thrust force on the wiping lip and the reaction is transmitted to the wiping arm and by the wiping arm to the drive unit and in particular via the sensor device on an object such as the vehicle or the housing of the sensor device. Preferably, the thrust unit is different from a rod, in particular a metal rod which, in particular in the unstressed state, would have a curved shape such as for example that of an elastic rail.

[0017] Preferably, the drive unit moves the wiping unit, in particular between its operating states, to a storage position in which the wiping lip is moved away from the thrust unit to a stop, to relieve the thrust element and / or a situation in which the wiping lip is moved away of the outer surface. The outer surface, in particular the protective element, may have a narrowed shape on one side. In particular, the protective element, in particular the covering wall, will have on at least one side and in particular on at least two opposite sides, a ramp element. For example, the drive unit is designed to move the wiping unit for wiping, from the storage position by passing over a ramp element and arriving on the outer surface, in particular on the protective element. For example, the drive unit drives the wiping unit to wipe the outer surface by passing at least over one ramp element and arriving from the outer surface to the storage position.

[0018] Preferably, the wiping unit comprises a wiping arm. The wiping lip is in particular largely housed in the wiping arm. The longitudinal axis of the wiping arm is parallel to the outer surface. At least the outer surface is practically rectangular. The wiping arm extends over at least one edge length of the outer surface. Preferably, the wiping arm is connected at at least one end of the extension of the wiping arm along the longitudinal axis thereof to the drive unit. The wiping arm is connected to the drive unit at both ends of its extension along the longitudinal axis.

[0019] Preferably, the wiper arm has, in section perpendicular to the longitudinal axis, a U-shaped blade, in particular a metal blade. The wiper arm has a U-shaped profile, in particular for the section perpendicular to its longitudinal axis. The wiper arm has a practically parallelepipedal shape. The wiper arm delimits a wiping cavity receiving a large part of the wiping lip. Preferably, an open side, in particular relative to the U-shaped profile of the wiper arm, is oriented towards the outer surface. The drive unit is securely connected to the vehicle or to the sensor device. The wiper arm is securely connected to the drive unit. Preferably, the thrust unit presses the wiping lip against the wiping arm, in particular against the drive unit, in particular against the vehicle and in particular against the sensor device on the outer surface.To regulate the thrust force, the wiping device has a linear guide unit which receives the wiping lip movably on the wiping arm.

[0020] Preferably, at least one aerodynamic thrust element is produced in the form of a deflector element to use the circulating wind and generate a thrust force. Preferably, at least one aerodynamic thrust element is connected directly to the wiper arm, in particular without intermediate elements.

[0021] Preferably, the aerodynamic thrust element has an active aerodynamic surface, oriented opposite the outer surface. The aerodynamic element thrust dynamics has an active aerodynamic surface inclined and / or oriented in part relative to the outer surface of the protective element. The aerodynamic thrust element has an outer side opposite the outer surface of the protective element and at least partly rounded. This aerodynamic thrust element can be produced in one part with the wiper arm. The expression "in one part" (or in one piece) means that the production is made in one piece and preferably obtained from a blank, a mass or a cast element and in a particularly preferential manner by an injection process, in particular an injection process with one or more components.

[0022] The embodiment of the wiping device according to the invention ensures the proper cleaning of the window element. In particular, the advantageous reliability properties of the sensor device to be cleaned are used. In particular, the safety level guarantees the operation of the sensor device for detecting objects. In particular, the movement of the vehicle can be used to effectively clean the sensor device.

[0023] According to another feature, the thrust element is installed on the side of the wiper arm opposite the outer surface of the protective element. The thrust element is provided on the side of the wiper arm opposite the wiper lip, being connected in particular to the wiper arm. The wiper lip and the thrust element are on opposite sides of the wiper arm, in particular on directly opposite sides of the wiper arm. Preferably, the thrust element is completely on the side of the wiper arm opposite the outer surface of the protective element. This provides an advantageous direction of action of the force.

[0024] According to another characteristic, the thrust element, in at least one operating state, has a maximum width which is at most equal to the maximum width of the wiper arm. Preferably, the thrust element has a maximum width which corresponds to at least half of the maximum width of the wiper arm. The thrust element has a width which depends in particular on the operating state and in particular on the traffic wind in the operating situation when traveling. For example, the thrust element has a width which, up to a limit value of the traveling speed of the vehicle, in particular for the traffic wind, is constant and which, from this limit value, increases with the traffic wind. Preferably, the width of an object is the largest extension perpendicular to the longitudinal axis of the object of the smallest parallelepiped which still completely surrounds the object.

[0025] Preferably, the width of the thrust element is oriented parallel to the outer surface. Preferably, the width of the thrust element is at least substantially perpendicular to the thrust force. The width of the thrust element or that of the wiper arm is measured in a perpendicular section to the longitudinal axis of the respective object. The expression "essentially or practically perpendicular" means in particular that it is the orientation of a direction relative to a reference direction, the direction and the reference direction in particular in a projection plane, forming an angle of 90° between them and this angle deviating at most by an angle of less than 8°, preferably less than 5° and particularly preferably less than 2°. At least one thrust element may have a width independent of the operating state. This corresponds to an advantageously economical thrust element.

[0026] According to a further feature, the thrust element has an axis of symmetry which is at least practically parallel to the thrust axis of the wiper arm.The expression "practically parallel" designates the orientation of a direction relative to a reference direction, in particular in a plane and which deviates from the reference direction by only a deviation of less than 8°, advantageously less than 5° and in a particularly advantageous manner, less than 2°. The thrust axis is at least practically perpendicular to the longitudinal axis of the wiping arm, in particular of the wiping lip. Preferably, the thrust axis is at least practically perpendicular to the outer surface of the protective element.

[0027] The axis of symmetry is at least partly that of a plane of symmetry, in particular a plane of mirror symmetry. The axis of symmetry is part of at least two planes of symmetry and in particular of at least two planes of mirror symmetry which are preferably perpendicular to each other. The thrust element comprises at least two halves divided in particular along the longitudinal axis of the thrust element and which are symmetrical with respect to one of the two planes of mirror symmetry. Preferably, the thrust element comprises two halves in particular divided practically perpendicular to the longitudinal axis of the thrust element and which with respect at least to the plane of mirror symmetry are symmetrical with respect to each other. Preferably, a thrust element has a two-digit rotational symmetry about the axis of symmetry. This allows for a advantageously uniform thrust force along the entire length of the wiping arm.

[0028] According to another characteristic, the thrust element is in a lateral zone on the side of the wiping arm, opposite the outer surface of the protective element. Preferably, the side of the wiping arm opposite the outer surface of the protective element is at least practically rectangular. Preferably, the side of the wiping arm opposite the outer surface of the protective element is at least practically flat. Preferably, the thrust element covers at least a maximum of two thirds, in particular a maximum of half and preferably a maximum of a quarter of the side of the wiping arm opposite the outer surface of the protective element. Preferably, the thrust element is in the lateral half which extends in particular from the center line, parallel to the longitudinal axis of the wiper arm, to an edge of the wiper arm, parallel to the longitudinal axis of the wiper arm on the side of the wiper arm opposite the outer surface of the protective element.

[0029] Preferably, the thrust element is provided on an edge on the side of the wiping arm opposite the outer surface of the protective element and which is parallel to the longitudinal axis of the wiping arm; this edge is spaced from another edge on the side of the wiping arm opposite the outer surface of the protective element, parallel to the longitudinal axis of the wiping arm. This results in a small thrust element, which makes it possible to have a deflector geometry that is particularly economical or uses little material.

[0030] According to another characteristic, the thrust element has an asymmetrical section in its installation on the wiper arm. Preferably, the thrust element has a section at least practically perpendicular to the longitudinal axis of the thrust element and which is asymmetrical in its installation on the wiper arm. In particular, the section of the thrust element is at least practically perpendicular to the longitudinal axis of the thrust element without mirror symmetry. Preferably, the thrust element is asymmetrical on the wiper arm, considered according to a section at least practically perpendicular to the longitudinal axis of the thrust element. Advantageously, there is a deflector symmetry which makes it possible to achieve advantageous limit values ​​between a laminar flow and a turbulent flow of the deflected wind.

[0031] According to another feature, in at least one area the thrust element has a substantially wedge-shaped cross-section. This thrust element may completely have a substantially wedge-shaped cross-section, according to a cross-section perpendicular to the longitudinal axis of the thrust element. This thrust element may have in at least two areas of the same cross-sectional dimensions, each time a substantially wedge-shaped cross-section, according to a cross-section practically perpendicular to the longitudinal axis of the thrust element. This thrust element may have at least practically a U-shaped cross-section according to a cross-section practically perpendicular to the longitudinal axis of the thrust element. This provides a stable connection between the thrust element and the wiper arm in combination with the advantage of a strong thrust force.

[0032] According to another characteristic, the active aerodynamic surface inclined relative to the outer surface of the protective element is concave in shape. The side of the thrust element opposite the outer surface of the protective element is produced as an active aerodynamic surface. Preferably, the active aerodynamic surface is at least partly concave, in particular according to a section (cut) perpendicular to the longitudinal axis of the thrust element. Alternatively, the active aerodynamic surface is at least partially convex, in particular along a section (cut) perpendicular to the longitudinal axis of the thrust element. Alternatively, the active aerodynamic surface is at least partially inclined towards the outer surface of the protective element, in particular along a section perpendicular to the longitudinal axis of the thrust element.

[0033] In particular, the active aerodynamic surface comprises at least in part, recesses in the direction of the outer surface of the protective element, in particular along a section perpendicular to the longitudinal axis of the thrust element. An aerodynamic thrust element is thus advantageously obtained.

[0034] According to another characteristic, the thrust element is flexible. Preferably, the thrust element is at least partly, preferably largely, made of a natural and / or synthetic elastomer. Alternatively, the thrust element is made at least partly and preferably at least largely in the form of a metal strip. In particular, the thrust element is made so that the section of the thrust element, perpendicular to its longitudinal axis, can be modified according to the circulation wind, preferably by at least 25%, preferably by at least 30%, particularly preferably by at least 50% and extremely preferably by at least 60%, in particular measured on the concordance of coverage of the surface, in particular abruptly, for the limit value of the circulation speed, for example set at 50 km / h, in particular for the circulation wind.This gives the advantage of a variable thrust force generated by the thrust element.

[0035] According to another characteristic, in its wind-driven state, the thrust element has a maximum width greater than the maximum width of the wiper arm. Preferably, at least in the wind-driven state, above the limit value or at the limit value of the traffic speed, for example 50 km / h, in particular for the traffic wind, the thrust element has a maximum width greater than the maximum width of the wiper arm and at least in another operating state, below the limit value, a maximum value which is at most as large as the maximum width of the wiper arm. This has the advantage of an intermediate reduction of the thrust force as a function of the traffic speed, in particular of the traffic wind.

[0036] According to another characteristic, the thrust element extends at least over 50%, in particular over at least 90%, of the extension of the wiping lip along the longitudinal axis of the wiping lip. Preferably, the wiping lip extends at least over 90% of the extension of the wiping arm along its longitudinal axis. Preferably, the thrust element extends at least over 50%, preferably over at least 60% and particularly preferably at least 75% and extremely preferably at least 90% of the extension of the wiper arm along its longitudinal axis. Preferably, the longitudinal axis of the wiper lip and the wiper arm are practically parallel. This provides an advantageously regular thrust along the longitudinal axis of the wiper arm, in particular along the longitudinal axis of the wiper lip.

[0037] The invention also relates to a sensor system, in particular a lidar system having at least one sensor device, in particular a lidar device which comprises a protective element and at least one wiping device for wiping the outer surface of the protective element. This achieves advantageous compatibility between the sensor device and the wiping device.

[0038] The invention also relates to a vehicle equipped with a sensor system, according to the invention. The vehicle may be a road vehicle, for example, a passenger vehicle or a utility vehicle or the like or a railway vehicle such as a train, or tractor, a tram or other or a water vehicle, such as for example, a ship. Preferably, the vehicle comprises at least two sensor systems. The sensor system comprises a thrust axis which makes an angle of less than 15° relative to the longitudinal axis of the vehicle. The sensor system has an activation axis which makes an angle of at least 15° relative to the longitudinal axis of the vehicle. The vehicle may be a cleaning vehicle, in particular a cleaning robot, for example, a wiping robot and / or a vacuum robot. There is the advantage of compatibility between the vehicle and the sensor system.

[0039] According to another characteristic, the thrust element is symmetrical with respect to the activation axis of the wiper arm, the thrust axis of the wiper arm making an angle of 15° with respect to the longitudinal axis of the vehicle, in particular, according to a protection on the base plane of the vehicle. Preferably, the thrust element of the sensor system makes with the activation axis, an angle of less than 15° with respect to the longitudinal axis of the vehicle, in particular according to a projection on the base plane of the vehicle, according to a mirror symmetry in section perpendicular to the longitudinal axis of the thrust element. The advantage of the central air flow on the vehicle is used.

[0040] The invention also relates to a thrust element asymmetrical with respect to a thrust axis of the wiper arm, the activation axis of the wiper arm making an angle of at least 15° with respect to the longitudinal axis of the vehicle, in particular according to a projection onto a base plane of the vehicle. Preferably, the thrust element of the sensor system makes with the activation axis an angle of at least 15° with respect to the longitudinal axis of the vehicle, in particular according to a projection onto the base plane of the vehicle, being asymmetrical along a section perpendicular to the axis Ion- horizontal of the thrust element. This has the advantage of using the lateral airflow passing over the vehicle. Brief description of the drawings

[0041] The present invention will be described below in more detail with the aid of exemplary embodiments of a wiping device according to the invention shown in the appended drawings in which:

[0042] [Fig-1] schematic representation of a vehicle according to the invention, equipped with three sensor systems, according to the invention,

[0043] [Fig.2] schematic representation of the sensor system according to the invention,

[0044] [Fig.3] schematic representation of the sensor system according to the invention,

[0045] [Fig.4] schematic representation of the wiping device according to the invention with the sensor system according to the invention,

[0046] [Fig.5] schematic representation of the wiping device according to the invention for a sensor system according to the invention,

[0047] [Fig.6] schematic representation of the wiping device according to the invention for a sensor system according to the invention

[0048] [Fig.7] schematic representation of a vehicle equipped with three sensor systems,

[0049] [Fig.8] schematic representation of a variant of the wiping device,

[0050] [Fig.9] schematic representation of another variant of the wiping device,

[0051] [Fig. 10] schematic representation of another variant of the wiping device,

[0052] [Fig. 11] schematic representation of another variant of the wiping device,

[0053] [Fig. 12] schematic representation of another variant of the wiping device,

[0054] [Fig. 13] schematic representation of another variant of the wiping device,

[0055] [Fig. 14] schematic representation of another variant of the wiping device,

[0056] [Fig. 15] schematic representation of another variant of the wiping device.

[0057] DESCRIPTION OF AN EMBODIMENT

[0058] [Fig.l] shows a vehicle 100a. The vehicle 100a is equipped with three sensor systems 200a, 202a, 204a. The sensor systems 200a, 202a, 204a are lidar systems. The vehicle 100a is a road vehicle, for example, a passenger vehicle.

[0059] [Fig.2] shows in an abstract and exemplary manner, the sensor system 202a representative of the three sensor systems 200a, 202a, 204a. The sensor system 202a comprises a sensor device 12a. The sensor device 12a is a lidar device. The sensor device 12a comprises a protective element 14a.

[0060] The sensor system 202a comprises a wiping device 10a. The wiping device 10a is provided for wiping the outer surface 16a of the protective element 14a.

[0061] The wiping device 10a comprises a wiping unit 18a. The wiping unit 18a has a wiping arm 20a. The wiping unit 18a has a wiping lip 22a. The wiping lip 22a is provided for wiping the outer surface 16a of the protective element 14a of the sensor device 12a, in particular the lidar device. The wiping lip 22a is coupled to the wiping arm 20a.

[0062] The wiping device 10a comprises an aerodynamic thrust element 24a, 50a, 52a. The thrust element 24a, 50a, 52a is connected to the wiping arm 20a. The thrust element 24a, 50a, 52a has an active aerodynamic surface 26a, 26a', 28a, 30a inclined relative to the outer surface 16a of the protective element 14a (see [Fig.4], [Fig.5] or [Fig.6]). With the air stream, the thrust element 24a, 50a, 52a generates a thrust force 48a to press the wiping lip 22a against the outer surface 16a of the protective element 14a.

[0063] The sensor device 12a is in the form of a lidar device. The sensor device 12a is provided for capturing or measuring objects. The sensor device 12a is applied to a vehicle 100a. The sensor device 12a is provided for capturing or measuring objects, in particular for autonomous driving. The sensor device 12a captures objects in the environment of the vehicle 100a. The sensor device 12a is in the form of a component of the vehicle 100a. The sensor device 12a, in particular the protective element 14a, is installed on the outer side of the vehicle 100a. The sensor device 12a comprises at least one lidar unit 32a. The lidar unit 32a has a lidar sensor element (not shown). The lidar unit 32a comprises a lidar housing 34a housing the lidar sensor element.The sensor device 12a comprises the protective element 14a which allows a laser beam of the sensor device 12a to exit the lidar housing 34a and which is in particular transparent to the detection wavelength of the lidar sensor element. The protective element 14a is designed as a cover wall. The protective element 14a covers the sensor device 12a partially towards the outside. The protective element 14a forms in particular the front part of the lidar housing 34a. The protective element 14a is made of glass, plastic or polycarbonate. The protective element 14a defines the outer surface 16a of the sensor device 12a as the outer surface of the protective element 14a, designed as a cover wall. The outer surface 16a is rectangular. The sensor device 12a is connected to a computing unit, in particular that of the vehicle 100a for exchanging data.

[0064] The wiping device 10a is designed to wipe the outer surface 16a. In particular, the wiping unit 18a mechanically cleans the protective element 14a, in particular with the wiping lip 22a. The wiping lip 22a is made of a rubbery material, in particular the wiping lip 22a is made of a natural and / or synthetic elastomer. The wiping lip 22a is housed largely in the wiping arm 20a (see [Fig. 3]). The longitudinal axis 36a of the wiping arm 20a is parallel to the outer surface 16a. The wiping arm 20a extends along the length of the short side of the rectangular surface 16a.

[0065] The wiping arm 20a has a section perpendicular to the longitudinal axis 36a of the wiping arm 20a which corresponds to a U-shaped metal rod. The wiping arm 20a has a U-shaped profile in particular according to the section perpendicular to the longitudinal axis 36a of the wiping arm 20a. The open side in particular with respect to the U-shaped section profile of the wiping arm 20a is turned towards the outer surface 16a. In particular, the side of the wiping arm 20a opposite the outer surface 16a is a flat outer surface. In particular, the outer surface of the side of the wiping arm opposite the outer surface 16a is parallel to this outer surface 16a. The wiping lip 22a of this embodiment is fixedly connected to the wiping arm 20a.

[0066] The wiping arm 20a is parallelepiped-shaped (see Figures 2 and 3). The wiping arm 20a delimits a wiping cavity 38a largely receiving the wiping lip 22a. The wiping lip 22a is slidably housed in the wiping cavity 38a. Preferably, the wiping lip 22a can be plugged along its longitudinal axis 40a into the wiping arm 20a to connect the wiping lip 22a to the wiping arm 20a.

[0067] The wiping device 10a comprises a drive unit 42a which moves the wiping unit 18a over the outer surface 16a to clean this outer surface 16a in a linear movement. The wiping arm 20a is securely connected to the drive unit 42a. The wiping unit 18a is guided by the drive unit 42a over the outer surface 16a to wipe it. The drive unit 42a moves the wiping unit 18a over the complete surface of the outer surface 16a, in particular to mechanically clean the outer surface 16a completely; the term "complete surface" means in particular that the wiping lip 22a is applied along the longitudinal axis 40a of this lip 22a. The drive unit 42a is securely connected to the sensor system 200a, 202a, 204a. The sensor system 200a, 202a, 204a is securely connected to the vehicle 100a.The wiper arm 20a is connected at the end of the wiper arm extension 20a along the longitudinal axis 36a of the wiper arm 20a to the drive unit 42a. The drive unit 42a moves the wiper unit 18a linearly to clean the outer surface 16a and in particular bidirectionally on the outer surface 16a; the pushing unit 44a then presses the wiper lip 22a against the outer surface 16a (see [Fig. 3]).

[0068] The thrust unit 44a is partly designed as an adjusting screw for connecting the wiper arm 20a to the drive unit 42a and which allows the distance between the wiper arm 20a in the direction of the normal to the surface to be adjusted. outer surface 16a. The thrust unit 44a is adjusted to a basic value of the thrust 46a of the wiper lip 22a against the outer surface 16a. The thrust unit 44a is designed to push the wiper lip 22a by the wiper arm 20a with the aid of the drive unit 42a onto the outer surface 16a against the vehicle 100a. The thrust unit 44a exerts the thrust force 48a on the wiping lip 22a in particular to apply the surface of the wiping lip 22a along the longitudinal axis 40a of the wiping lip 22a against the outer surface 16a. The wiping device 10a comprises the thrust unit 44a. The thrust unit 44a exerts a minimal thrust force on the wiping lip 22a in particular to press the wiping lip 22a against the outer surface 16a with a regular thrust force of at least 10N / m and preferably at least 14N / m.

[0069] The thrust unit 44a is made other than an elastic rail. The thrust unit 44a is different from a rod, in particular a metal rod which, in particular in the unstressed state, would have a curved shape as is the case with an elastic rail. The thrust unit 44a is made to exert a thrust force 48a on the wiping lip 22a and the reaction is transmitted to the wiping arm 20a and by the wiping arm 20a by the drive unit 42a and in particular by the sensor unit 12a by an object and for example the vehicle 100a or the lidar housing 34a of the lidar unit 32a.

[0070] The drive unit 42a moves the wiping unit 18a, in particular between the operating states of the wiping unit 18a, into a storage position in which the wiping lip 22a is spaced from the outer surface 16a. The protective element 14a has on one side a ramp element 47a (see [Fig. 4]). The drive unit 42a moves the wiping unit 18a for wiping, from its storage position by passing over the ramp element 47a to arrive at the outer surface 16a. The drive unit 42a stops the wiping unit 18a in order to wipe the outer surface 16a by passing over the ramp element 47a from the outer surface 16a to arrive in the storage position.

[0071] The wiping lip 22a of the wiping unit 18a is interchangeable. In particular, the wiping lip 22a of the wiping unit 18a can be changed without requiring a tool. The wiping arm 20a can be electrically heated.

[0072] The side of the wiping arm 20a not facing the outer surface 16a of the protective element 14a is at least substantially rectangular in shape. The side of the wiping arm 20a not facing the outer surface 16a of the protective element 14a is at least substantially flat.

[0073] The aerodynamic thrust element 24a, 50a, 52a extends over at least 90% of the extension of the wiping lip 22a, along the longitudinal axis 40a of the wiping lip 22a. The wiping lip 22a extends over at least 90% of the extension of the wiping arm 20a along the longitudinal axis 36a of the wiping arm 20a. The aerodynamic thrust element 24a, 50a, 52a extends over at least 90% of the extension of the wiping arm 20a along the longitudinal axis 36a of the wiping arm 20a. thrust 24a, 50a, 52a extends over at least 90% of the extension of the wiper arm 20a along the longitudinal axis 36a of the wiper arm 20a. The longitudinal axis 40a of the wiper lip 22a and the longitudinal axis 36a of the wiper arm 20a are oriented parallel to each other.

[0074] The aerodynamic thrust element 24a, 50a, 52a is designed as a deflector element for utilizing the circulating wind 54a and generating a thrust force 48a. The aerodynamic thrust element 24a, 50a, 52a is directly connected to the wiper arm 20a. The aerodynamic thrust element 24a, 50a, 52a has an active aerodynamic surface 26a, 26a', 28a, 30a that is oriented against the outer surface 16a. The aerodynamic thrust element 24a, 50a, 52a partly comprises an active aerodynamic surface 26a, 26a', 28a, 30a that is inclined relative to the outer surface 16a of the protective element 14a. The aerodynamic thrust element 24a, 50a, 52a is on the side of the wiper arm 20a opposite the outer surface 16a of the protective element 14a.

[0075] The aerodynamic thrust element 24a, 50a, 52a is installed on the side of the wiper arm 20a opposite the wiper lip 22a; in particular, it is connected to the wiper arm 20a. The wiper lip 22a and the aerodynamic thrust element 24a, 50a, 52a are on opposite sides of the wiper arm 20a; in particular, they are oriented on opposite sides of the wiper arm 20a. The aerodynamic thrust element 24a, 50a, 52a completely covers the side of the wiper arm 20a opposite the outer surface 16a of the protective element 14a.

[0076] The aerodynamic thrust element 24a, 50a, 52a has, in at least one operating state, a maximum width 58a, 60a, 62a which corresponds at most to the maximum width 56a of the wiper arm 20a. The aerodynamic thrust element 24a, 50a, 52a has a maximum width 58a, 60a, 62a which corresponds at least to half of the maximum width 56a of the wiper arm 20a. The aerodynamic thrust element 24a, 50a, 52a has a width 58a, 60a, 62a independent of the operating state.

[0077] [Fig.4], [Fig.5] and [Fig.6] each show one of the three sensor systems 200a, 202a, 204a. The different sensor systems 200a, 202a, 204a are equipped with different thrust elements 24a, 50a, 52a.

[0078] For figures 4 to 6, only the differences between the thrust elements 24a, 50a, 52a will be explained; all the references correspond.

[0079] [Fig.4] shows the thrust element 24a applied against the sensor system 202a.

[0080] The thrust element 24a is symmetrical with respect to the thrust axis 64a of the wiper arm 20a; the thrust axis 64a of the wiper arm 20a makes an angle a (see [Fig.7]) less than 15° with respect to the longitudinal axis 66a of the vehicle, in particular in a projection onto the base plane 68a of the vehicle 100a (see [Fig.4] and [Fig.7]). In the sensor system 202a, the thrust element 24a is oriented along the thrust axis 64a with an angle a (see [Fig.7]) of less than 15° relative to the longitudinal axis 66a of the vehicle, in particular in a projection onto the base plane 68a of the vehicle 100a, with a symmetrical shape in its sectional representation perpendicular to the longitudinal axis 70a of the thrust element 24a (see [Fig.4] and [Fig.7]).

[0081] The thrust element 24a has an axis of symmetry 72a which is parallel to the thrust axis 64a of the wiping arm 20a. The thrust axis 64a is perpendicular to the longitudinal axis 36a, 40a of the wiping arm 20a, in particular of the wiping lip 22a. The thrust axis 64a is oriented perpendicular to the outer surface 16a of the protective element 14a. The axis of symmetry 72a is part of two planes of symmetry, in particular of at least two planes of symmetry which are perpendicular to each other.

[0082] The thrust element 24a comprises two halves 76a, 76a' in particular along the longitudinal axis 70a of the thrust element 24a and which are symmetrical to each other in the two planes of symmetry.

[0083] The thrust element 24a comprises two halves 78a, 78a' in particular divided perpendicularly to the longitudinal axis 70a of the thrust element 24a and which are symmetrical with respect to each other along the two planes of symmetry (see [Fig. 3]). The thrust element 24a has a two-digit rotational symmetry around the axis of symmetry 72a.

[0084] The thrust element 24a comprises two zones, namely the halves 76a, 76a', with a wedge-shaped section. The thrust element 24a has a wedge-shaped section in its entirety; this section is perpendicular to the longitudinal axis 70a of the thrust element 24a.

[0085] [Fig.5] shows the thrust element 52a applied to the sensor system 204a. [Fig.6] shows the thrust element 50a applied to the sensor system 204a.

[0086] The thrust elements 50a, 52a are asymmetrical with respect to the thrust axis 60a of the wiper arm 20a; the thrust axes 64a of the wiper arm 20a make an angle of at least 15° with respect to the longitudinal axis 66a of the vehicle, in particular in a projection onto the base plane 68a of the vehicle 100a.

[0087] The thrust elements 50a, 52a are oriented relative to the thrust axis 64a which makes an angle a (see [Fig.7]) of at least 15° relative to the longitudinal axis 66a of the vehicle, in particular in a projection onto the base plane 68a of the vehicle 100a which is asymmetrical along a section perpendicular to the longitudinal axis 70a of the thrust elements 50a, 52a.

[0088] The thrust elements 50a, 52a are provided respectively in a lateral area on the side of the wiping arm opposite the outer surface 16a of the protective element 14a. The thrust elements 50a, 52a are provided on different sides of the vehicle 100a. The thrust elements 50a, 52a are on different sides of the wiper arm 20a side, opposite the outer surface 16a of the protective element 14a, to better utilize the circulating wind 54a.

[0089] The thrust elements 50a, 52a each cover a maximum of two thirds, in particular a maximum of one half, of the side of the wiping arm 20a opposite the outer surface 16a of the protective element 14a.

[0090] The thrust elements 50a, 52a are provided respectively in a lateral half which is located, relative to the center line parallel to the longitudinal axis 36a of the wiper arm 20a, towards the edge of the wiper arm 20a, parallel to the longitudinal axis 36a of the wiper arm 20a on the side of the wiper arm 20a opposite the outer surface 16a of the protective element 14a. The thrust elements 50a, 52a are provided respectively on an edge on the side of the wiper arm 20a opposite the outer surface 16a of the protective element 14a which is parallel to the longitudinal axis 36a of the wiper arm 20a while being spaced apart from the other edge, parallel to the longitudinal axis 36a of the wiper arm 20a on the side of the wiper arm 20a opposite the outer surface 16a of the protective element 14a.

[0091] The thrust elements 50a, 52a each have an asymmetrical section on the wiper arm 20a. The thrust elements 50a, 52a have a section perpendicular to the longitudinal axis 70a of the thrust element 50a, 52a which is asymmetrical on the wiper arm 20a. In particular, the section of the thrust elements 50a, 52a perpendicular to the longitudinal axis 70a of the thrust elements 50a, 52a does not have mirror symmetry; the mirror plane is perpendicular to the outer surface 16a. The thrust elements 50a, 52a are respectively asymmetrical on the wiper arm 20a considered in a section perpendicular to the longitudinal axis 70a of the thrust elements 50a, 52a.

[0092] The thrust elements 50a, 52a have, in at least one region, a cross-section that is at least substantially wedge-shaped. The thrust elements 50a, 52a have, in each case, a complete cross-section that is wedge-shaped, perpendicular to the longitudinal axis 70a of the thrust elements 50a, 52a.

[0093] Figures 8 to 15 show other embodiments of the invention. The descriptions and drawings relating thereto are limited to the differences between the embodiments; for the same components, the same references will be used in relation to the previous components, both in the drawings and in the description and in particular according to Figures 1 to 7. To distinguish the embodiments, the suffix (a) of the references of the embodiment of Figures 1 to 7 will be replaced in Figures 8 to 15 respectively by the suffixes (b) (h) without all the elements of these other elements, identical to those of Figures 1 to 7, being again represented with the modified suffixes. For example, the elements of [Fig. 7] such as the thrust axis 64a, the longitudinal axis 66a, the base plane 68a, the vehicle 102a will not be redrawn with the references adapted to the embodiments [Fig.8] to 15 although these references are adapted by their suffixes (b)., (h) to each embodiment.

[0094] [Fig.8] shows with the conversion relating to the suffix (b) an alternative embodiment of the geometry of the thrust element in particular for a sensor system 202b having a thrust axis 64b making an angle a (see [Fig.7]) less than 15° relative to the longitudinal axis 66b of the vehicle, in particular according to a projection on the base plane 68b of the vehicle 100b.

[0095] [Fig. 8] shows a variant of the wiping device 10b. The wiping device 10b comprises a thrust element 74b. The thrust element 74b has in particular an active aerodynamic surface 80b; it has a substantially U-shaped section perpendicular to the longitudinal axis 70b of the thrust element 74b. The thrust element 74b has at least in part an outer side, in particular a surface 80b, opposite the outer surface 16b of the protective element 14b and which is at least in part rounded. The active aerodynamic surface 80b is concave relative to the outer surface 16b of the protective element 14b. The side of the thrust element 74b opposite the outer surface 16b of the protective element 14b is produced in the form of an active aerodynamic surface 80b. The active aerodynamic surface 80b is at least partly concave, in particular along a section perpendicular to the longitudinal axis 70b of the thrust element 74b.

[0096] [Fig.9] shows an alternative embodiment of the geometry of the thrust element and in particular for a sensor system 202c with a thrust axis 64c which makes an angle a (see [Fig.7]) less than 15° relative to the longitudinal axis 66c of the vehicle, in particular according to a projection onto the base plane 68c of the vehicle 100c.

[0097] [Fig. 9] shows a variant of the wiping device 10c. The wiping device 10c comprises a thrust element 82c. The thrust element 82c has in particular an active aerodynamic surface 84c at least practically a U-shaped section, perpendicular to the longitudinal axis 70c of the thrust element 82c. The low point of the V-shape of the thrust element 82c reaches as far as the wiping arm 20c. In particular, the thrust element 82c has a V-shaped recess in the direction of the upper surface 16c of the protective element 14c, according to a section perpendicular to the longitudinal axis 70c of the thrust element 82c.

[0098] [Fig. 10] shows an alternative embodiment of the geometry of the thrust element, in particular for a sensor system 202h with a thrust axis 64h which makes an angle a (see [Fig.7]) less than 15° relative to the longitudinal axis 66h of the vehicle, in particular according to a projection onto the base plane 68h of the vehicle 100h.

[0099] [Fig. 10] shows a variant of the wiping device 100h. The wiping device 100h has a thrust element 86h. The thrust element 86h has in particular an active aerodynamic surface 88h which has at least practically a V-shaped section, perpendicular to the longitudinal axis 70h of the thrust element 86h. The low point of this V-shape of the thrust element 86h arrives at half the distance from the wiper arm 20h.

[0100] [Fig. 11] shows an alternative embodiment of the geometry of the thrust element. [Fig. 11] shows in particular an alternative embodiment of the wiping device 10d. The wiping device 10d has a thrust element 90d. The thrust element 90d has in particular an active aerodynamic surface 92d having an at least substantially U-shaped section, perpendicular to the longitudinal axis 70d of the thrust element 90d.

[0101] The thrust element 90d has at least in part an outer side opposite the upper surface 16d of the protective element 14d. This outer side is an at least partly rounded surface 92d.

[0102] The thrust element 90d has a width 94d depending on the operating state, in particular the circulating wind in operation. For example, the thrust element 90d has a width 94d which reaches a limit value for the circulating wind, in particular for the circulating wind up to a maximum deviation of 10% constant and which from this limit value increases with the circulating wind.

[0103] The thrust element 90d is flexible. The thrust element 90d is at least partly and preferably at least largely made of a natural and / or synthetic elastomer. In particular, the thrust element 90d is made so that its section perpendicular to the longitudinal axis of the thrust element 90d changes depending on the traffic wind, by at least 25% in particular measured on the identity of coverage of the surface 92d in particular abruptly for the limit value of the speed of the vehicle, for example, 50 km / h in particular for the traffic wind.

[0104] [Fig. 12] shows the thrust element 90d in the wind-affected state above the limit value. The wind-affected thrust element 90d has a maximum width 94d greater than the maximum width 98d of the wiper arm 20d. The thrust element 90d has at least in the wind-affected state, above the limit value or at the limit value of the traffic speed, for example 50 km / h, in particular for the traffic wind, a maximum width 94d greater than the maximum width 98d of the wiper arm 20d and at least in another operating state below the limit value, a maximum width 94d which is at most equal to the maximum value 98d of the wiper arm 20d.

[0105] [Fig. 13] shows an alternative embodiment of the geometry of the thrust element, in particular for a sensor system 202e with a thrust axis 64e which makes an angle a (see [Fig.7]) of at least 15° relative to the longitudinal axis 66e of the vehicle in particular according to a projection on the base plane 68e of the vehicle 100e.

[0106] [Fig. 13] shows a variant of the wiping device 10e. The wiping device 10e has a thrust element 96e. The thrust element 96e has in particular an active aerodynamic surface 102e with an asymmetrical section perpendicular to the longitudinal axis 70e of the thrust element 96e. The thrust element 96e has at least partly an outer side opposite the outer surface 16e of the protective element 14e which is in particular an at least partly rounded surface 102e. The thrust element 96e extends on one side, in section perpendicular to the longitudinal axis 70e of the thrust element 96e, further away from the wiper arm 20e than on the other side.

[0107] [Fig. 14] and [Fig. 15] each show an alternative embodiment of the geometry of the thrust element, in particular for a sensor system 202f, 202g with a thrust axis 64f, 64g which makes an angle a (see [Fig.7]) of at least 15° relative to the longitudinal axis 66f, 66g of the vehicle, in particular in a projection onto a base plane 68f, 68g of the vehicle 100f, 100g.

[0108] [Fig. 14] shows a variant of the wiping device 10f. The wiping device 10f has a thrust element 104f. The thrust element 104f has in particular an active aerodynamic surface 106f which has an asymmetrical section perpendicular to the longitudinal axis 70f of the thrust element 104f. The thrust element 104f has at least in part an outer side opposite the outer surface 16f of the protective element 14f and which is in particular an at least partly inclined surface 106f. The thrust element 104f extends on one side in section perpendicular to the longitudinal axis 70f of the thrust element 104f, moving away from the wiping arm 20f more than on the other side. The thrust element 104f deviates on one side of the section perpendicular to the longitudinal axis 70f of the thrust element 104f, by a maximum of 2mm from the wiper arm 20f.

[0109] [Fig. 15] shows a variant of the wiping device 10g. The wiping device 10g has a thrust element 108f. The thrust element 108g has in particular an active aerodynamic surface 110g with an asymmetrical section, perpendicular to the longitudinal axis 70g of the thrust element 108g. The thrust element 108g has at least in part an outer side opposite the outer surface 16g of the protective element 14g which is an at least partly inclined surface 110g. The thrust element 108g is on one side in section perpendicular to the longitudinal axis 70g of the thrust element 108g further from the wiping arm 20g than on the other side. The thrust element 108g extends on one side in the section perpendicular to the longitudinal axis 110g of the thrust element 108g deviating by at least 3mm from the wiper arm 20g.

[0110] NOMENCLATURE OF MAIN ELEMENTS

[0111] 10 Wiping device

[0112] 12 Sensor device

[0113] 14 Protective element

[0114] 16 Outer surface

[0115] 18 Wiper unit

[0116] 20 Wiper arm

[0117] 22 Wiper lip

[0118] 24 Aerodynamic thrust element

[0119] 26 Active aerodynamic surface

[0120] 28 Active aerodynamic surface

[0121] 30 Active aerodynamic surface

[0122] 48 Thrust force

[0123] 50 Aerodynamic thrust element

[0124] 52 Aerodynamic thrust element

[0125] 56 Maximum width of the wiping arm

[0126] 58 Maximum width

[0127] 60 Maximum width

[0128] 62 Maximum width

[0129] 66 Longitudinal axis of the vehicle

[0130] 72 Axis of symmetry of a thrust element

[0131] 74 Aerodynamic thrust element

[0132] 80 Active aerodynamic surface

[0133] 82 Aerodynamic thrust element

[0134] 84 Active aerodynamic surface

[0135] 86 Aerodynamic thrust element

[0136] 88 Active aerodynamic surface

[0137] 90 Aerodynamic thrust element

[0138] 92 Active aerodynamic surface

[0139] 96 Aerodynamic thrust element

[0140] 100 Vehicle

[0141] 102 Active aerodynamic surface

[0142] 104 Aerodynamic thrust element

[0143] 106 Active aerodynamic surface

[0144] 108 Aerodynamic thrust element

[0145] 110 Active aerodynamic surface

[0146] 200 Sensor system

[0147] 202 Sensor system

[0148] 204 Sensor system

Claims

Claims

1. Wiping device (10a-h) comprising at least one wiping unit (18a) having at least one wiping arm (20a-h) and at least one wiping lip (22a-h) for wiping an outer surface (16a) of a protective element (14a) of a sensor device (12a), in particular a lidar device, the wiping lip (22a-h) being coupled to the wiping arm (20a-h), wiping device characterized by -at least one aerodynamic thrust element (24a, 50a, 52a; 74b; 82; 90d; 96e; 104f; 108g; 86h), connected to the wiping arm (20a-h), comprising an active aerodynamic surface (26a, 26a', 28a, 30a; 80b; 84; 92d; 102; 106f; 110g; 88h) inclined relative to the outer surface (16a) of the protective element (14a) and which generates a thrust force (48a-h) by the air stream, to press the wiping lip (22a-h) against the outer surface (16a) of the protective element (14a).

2. Wiping device (10a-h) according to claim 1, characterized in that the pushing element (24a, 50a, 52a; 74b; 82; 90d; 96e; 104; 108g; 86h) is on the side of the wiping arm (20a-h) opposite the outer surface (16a) of the protective element (14a).

3. Wiping device (10a-h) according to claim 1 or 2, characterized in that the pushing element (24a, 50a, 52a; 74b; 82c; 90d; 96e; 104f; 108g; 86h) at least in one operating state, has a maximum width (58a, 60a, 62a) which corresponds at most to the maximum width (56a) of the wiping arm (20a-h).

4. Wiping device (10a; 10b; 10c; 10d; 10h) according to one of the preceding claims, characterized in that the thrust element (24a; 74b; 82c; 90d; 86h) has an axis of symmetry (72a) which is at least substantially parallel to the thrust axis (64a) of the wiping arm (20a).

5. Wiping device (10a) according to claim 1 or 2, characterized in that the pushing element (50a, 52a) is in a lateral area on the side of the wiping arm (20a) opposite the outer surface (16a) of the protective element (14a).

6. Wiping device (10a; 10e; 10f; 10g) according to claims 1, 2 or 5, characterized in that the thrust element (50a, 52a; 96e; 104f; 108g) installed on the wiping arm (20a; 20e; 20f; 20g) has an asymmetrical section.

7. Wiping device (10a; 10c; 10f; 10g; 10f) according to one of the preceding claims, characterized in that the thrust element (50a, 52a; 82c; 104f; 108g; 86h) has, in at least one area, an at least substantially wedge-shaped section.

8. Wiping device (10b; 10d; 10e) according to one of claims 1 to 5, characterized in that the active aerodynamic surface (80b; 92d; 102e) inclined relative to the outer surface (16a) of the protector element (14a) is of concave shape.

9. Wiping device (10d) according to one of the preceding claims, characterized in that the pushing element (90d) is flexible.

10. Wiping device (10d) according to claim 9, characterized in that the thrust element (90d), at least in a state subjected to the air flow, has a maximum width (94d) greater than the maximum width (98d) of the wiping arm (20d).

11. Wiping device (10a-h) according to one of the preceding claims, characterized in that the thrust element (24a, 50a, 52a; 74b; 82; 90d; 96e; 104f; 108g; 86h) extends along the longitudinal axis (40a) of the wiping lip (22a-h) over at least 50%, in particular over at least 90% of the extension of the wiping lip (22a-h).

12. Sensor system (200a, 202a, 204a) in particular lidar system comprising at least one sensor device (12a), in particular a lidar device provided with a protective element (14a) and at least one wiping device (10a-h) according to one of claims 1 to 11, for wiping the outer surface (16a) of the protective element (14a).

13. A vehicle (100a) comprising a sensor system (200a, 202a, 204a) according to claim 12.

14. Vehicle (100a) according to claim 13, characterized in that the thrust element (24a; 74b; 82c; 90d; 86h) is symmetrical with respect to the thrust axis (64a) of the wiper arm (20a; 20b; 20c; 20d; 20h), the thrust axis (64a) of the wiper arm (20a; 20b; 20c; 20d; 20h) making an angle of less than 15°, with respect to the longitudinal axis (66a) of the vehicle.

15. Vehicle (100a) according to claim 13, characterized in that the thrust element (50a, 52a; 96e; 104f; 108g) is asymmetrical with respect to the thrust axis (64a) of the wiper arm (20a; 20e; 20f; 20g), the thrust axis (64a) of the wiper arm (20a; 20e; 20f; 20g) forming with respect to the longitudinal axis (66a) of the vehicle, an angle of at least 15°.

Images