DE202016001218U1 - Rear window wiper for a motor vehicle - Google Patents

Abstract

Rear windshield wiper for a motor vehicle, comprising: - a wiper shaft (12) which is hollow at least in sections, - a wiper arm (14) which is connected in a rotationally fixed manner to the wiper shaft (12) and which can be moved by means of the wiper shaft (12) which can be driven rotatably and reversibly via a wiping field (8 ) of a rear window (7) of the motor vehicle, - at least one fluid line (16) extending axially through the wiper shaft (12) and having an outlet end (25) with a first fluid outlet (22) and with a second fluid outlet (24 ) is in flow communication.

Description

Technical area

The present development relates to a rear window wiper for a motor vehicle, in particular a rear window wiper in combination with a rear side arranged on the motor vehicle camera.

background

Motor vehicles having a rear window wiper and a camera for monitoring behind the motor vehicle area are in the art, such as DE 10 2006 036 359 A1 basically known. Especially estate cars and transporters with a relatively steeply sloping rear window are typically equipped with a rear window wiper. Common rear window wipers are further coupled to a spray nozzle, by means of which cleaning fluid provided for cleaning the rear window can be applied to the rear window. A wiper blade of the rear window wiper is typically moved back and forth by an electric motor in a circular arc in order to free a wiping field of the rear window from contamination, for example from spray and rain water, as well as from dirt.

It is also known to provide at the vehicle rear sensors, for example. Ultrasonic sensors or optical sensors, such as in the form of a camera. With a rear-side, ie rear-facing camera, an area lying behind the motor vehicle can be visually detected and displayed by means of a data transmission and image transmission with the camera coupled and arranged in the interior of the vehicle screen for the driver of the vehicle. Sensors located outside the rear of the vehicle, such as ultrasonic sensors or cameras, are susceptible to contamination. It is therefore necessary to clean the sensors and / or the camera either by means of a dedicated cleaning device or to arrange a camera in the interior of the motor vehicle, for example in the region of a rear window.

In contrast, the present invention is based on the object to provide an improved rear window wiper for a motor vehicle, which is not only suitable for cleaning a wiping field of the rear window, but also for cleaning a camera arranged on the outside of the vehicle rear. The rear window wiper should be as simple as possible and implementable at a low cost. He should also be characterized by a low-maintenance long-term operation. The improved rear wiper is to be implementable and realizable while retaining as many existing components of rear wiper as possible. In particular, existing rear window wipers should be retrofittable by replacing as few parts as possible to form the improved rear window wiper.

Advantageous embodiments

This object is achieved with a rear window wiper for a motor vehicle according to the independent protection claim 1 and with a motor vehicle according to claim 14. Advantageous embodiments are the subject of each dependent claims.

Accordingly, a rear window wiper for a motor vehicle is provided. The rear window wiper has an at least partially hollow wiper shaft and a wiper arm. The wiper arm is rotatably connected to the wiper shaft. Further, the wiper arm is movable by means of the rotatable and reversibly driven, typically electric motor driven wiper shaft via a wiping field of a rear window of the motor vehicle. The rear window wiper further includes a fluid conduit extending axially through the wiper shaft and in fluid communication with a discharge end facing the wiper arm having a first fluid outlet and a second fluid outlet.

In this way, the cleaning fluid delivered by the fluid conduit can be conveyed to the exterior of the motor vehicle via both the first and second fluid outlets. By means of a single pump connected to the fluid line, the cleaning fluid can flow simultaneously through the first and through the second fluid outlet.

The provision of at least two fluid outlets at the outlet end of the fluid line extending through the wiper shaft makes it possible to simultaneously clean a rear window and sensors arranged outside the rear of the vehicle, for example a camera. A separate cleaning device for such sensors or for a camera is not required. The rear window wiper can take over the cleaning function for sensors arranged at the rear, in particular for a rear-mounted camera in full. As a result, weight, space and costs for the production of the motor vehicle can be saved.

According to a further embodiment, the first fluid outlet and the second fluid outlet are aligned in different directions. As a result, different areas on the vehicle rear can simultaneously with a cleaning fluid be charged. The different orientations of the first and second fluid outlet can be adapted as needed to the specific geometric configuration of the vehicle rear, in particular to the rear-side positioning of at least one sensor, for example an imaging camera.

According to a further embodiment, the first fluid outlet and the second fluid outlet are aligned in diametrically opposite directions. For example, the first fluid outlet may be oriented upward, in the vehicle vertical direction, while the second fluid outlet is oriented downward, opposite to the vehicle vertical direction.

Such an arrangement and alignment of the first and second fluid outlet, for example, allows the arrangement of the rear window wiper between a wiping field of the rear window and at least one arranged at the rear of the vehicle sensor.

According to a development of the first fluid outlet is directed to the wiping field of the rear window. The cleaning fluid flowing over the first fluid outlet thus reaches the wiping field of the rear window. In combination with the oscillating and reversing driven and provided with a wiper blade wiper arm, the wiping field of the rear window can thus be effectively removed from impurities and dirt.

According to a further embodiment, the second fluid outlet is aligned with at least one outside of the rear of the motor vehicle arranged sensor, in particular on an imaging camera. The orientation of the second fluid outlet on the at least one sensor enables a needs-based cleaning of the relevant sensor, in particular of a sensor designed as a camera. Typically, by user-controlled or sensor-controlled activation of a feed pump, the cleaning fluid is conveyed through the fluid line to the discharge end of the fluid line. The pumped by the pump cleaning fluid then passes through the first fluid outlet to the wiping field of the disc and the second fluid outlet directly to the outside and arranged at the rear of the motor vehicle camera. The wiping field and the at least one sensor or a camera can thus be cleaned simultaneously.

According to a further embodiment, at least one of the first and second fluid outlet has a spray nozzle. Furthermore, at least one of the first and second fluid outlet can also be designed as a spray nozzle. The embodiment in the form of a spray nozzle allows the application of the sensor or the wiping field with a spatially concentrated or focused cleaning jet. Furthermore, depending on the specific configuration of the spray nozzle, it can also provide an atomizing effect, so that the rear window and / or the sensor can be uniformly and widely applied with the cleaning fluid.

Corresponding to the geometric configuration of the at least one sensor, the spray nozzle aligned with the respective sensor can, for example, direct a comparatively focused or concentrated jet onto the sensor.

According to a further embodiment, both the first and the second fluid outlet to a spray nozzle. Alternatively, the first and the second fluid outlet are designed in the form of a spray nozzle. The first fluid outlet in this respect has a first spray nozzle, while the second fluid outlet has a second spray nozzle. The first and the second spray nozzle can be made substantially identical. But it is also conceivable that the first and the second spray nozzle are configured differently. The first spray nozzle can be configured, for example, as a spray nozzle, while the second spray nozzle directs a spatially focused or spatially concentrated jet onto the sensor. The second spray nozzle can be configured as a kind of "jet nozzle".

According to a further embodiment of the rear window wiper, the fluid line branches at its outlet end Y-shaped or T-shaped in the first fluid outlet and in the second fluid outlet. Through a Y-shaped or T-shaped branch, both the first fluid outlet and the second fluid outlet are in direct flow communication with the fluid conduit. The branching can be symmetrical but also asymmetrical. For example, a line extending from the fluid line to the second fluid outlet may have a different, for example, smaller cross section than a line section of the fluid line extending to the first fluid outlet.

Upon activation of the fluid-conveying feed pump, different amounts of cleaning fluid can thus be directed, on the one hand, to the wiping field of the rear window and, on the other hand, to the at least one sensor. The cleaning fluid consumption can be reduced or optimized in this way.

According to a further embodiment, the rear window wiper has a cover which encloses a connection region of the wiper arm to the wiper shaft at least in sections. The cover can fulfill a dual function here. On the one hand, it can cover the mechanical connection of the wiper arm to the wiper shaft and protect against environmental influences. On the other hand, the first and second fluid outlet may be integrated in the cover. Thus, for example, be extended by the mere replacement of the cover of the functional scope of the rear window wiper. For example, a cover provided with only a single fluid outlet can be replaced and replaced with a cover provided with first and second fluid outlet.

Without making any other structural changes, a conventional rear window wiper can be extended by a cleaning function for at least one sensor arranged outside on the rear of the vehicle.

According to a further embodiment, the cover axially spaced from the outlet end of the fluid line to a baffle surface for a fluid jet. The baffle is typically located on the inside of a front side of the cover. The baffle is typically at a predetermined axial distance from the axial end of the wiper shaft and to the outlet end of the fluid conduit. The fluid line can end in the axial direction, for example, flush with the axial end of the wiper shaft. The baffle is oriented at an intended angle to the direction of an exit jet from the fluid conduit. The baffle can provide a nebulizing effect and target the cleaning fluid impinging on it both on the wiping field of the rear window and on the at least one sensor.

According to a further embodiment, the cover has a first side wall with a first passage opening and a second side wall with a second passage opening. The first and second sidewalls are typically provided opposite one another on the cover. In particular, the cover may be formed by the first and the second side wall and by the baffle surface therebetween. It is also conceivable that the cover has an at least partially cylindrical contour and geometry. Opposite or diametrically opposite first and second passage openings can also be arranged in one and the same approximately sectionally cylindrically shaped side wall.

A jet of cleaning fluid emerging from the outlet end of the fluid conduit impinges upon the baffle surface of the cover and rebounds therefrom toward the first and second side walls. The major part of the rebounding from the baffle fluid flow can finally pass through the first and the second passage opening, so that the cleaning fluid can be directed as lossless on the wiping field of the rear window and the at least one sensor.

According to a further embodiment, the first and the second side wall are connected to each other via the intermediate baffle surface. In particular, the cover may be formed as a one-piece plastic injection-molded component. In particular, the cover can rest positively on the connection region of the wiper arm, on the wiper shaft both on the wiper arm and on the wiper shaft. The cover may be attached to the wiper arm or to the wiper shaft, for example, by clips. Furthermore, it is conceivable that the cover is fastened in a form-fitting manner both on the wiper arm and on the wiper shaft by means of suitable fastening elements.

According to a further embodiment of the rear window wiper, the first fluid outlet is formed by the first passage opening. Furthermore, the second fluid outlet is formed by the second passage opening. In this embodiment, there is a free space between the first and the second fluid outlet and the outlet end of the fluid line, in which the pumped cleaning fluid impinges on the baffle surface and bounces off the baffle surface in the direction of the first and second fluid outlet or first and second through-opening. Furthermore, according to a further aspect, a motor vehicle with a motor vehicle body and with at least one sensor arranged outside on a vehicle rear end of the body, for example in the form of a camera, is provided. The motor vehicle also has a rear window wiper described above. The rear window wiper here serves to clean the wiping field of the rear window as well as to clean at least one sensor arranged in the vicinity of the rear window wiper.

Brief description of the figures

Other objects, features and advantageous embodiments of the rear window wiper are explained in the following description of exemplary embodiments with reference to the drawings. Hereby show:

1 a schematic side view of a configured as a passenger car motor vehicle,

2 an isolated rear view of a rear flap provided with a rear window wiper,

3 a cross section AA through the vehicle rear according to 2 and

4 a schematic representation of another embodiment of the Rear window wiper with at least two fluid outlets designed as spray nozzles.

Detailed description

This in 1 schematically shown motor vehicle 1 has a self-supporting motor vehicle body 2 with an interior acting as a passenger compartment 3 on. The car 1 has a comparatively strongly sloping rear of the vehicle 4 on. One at the rear of the vehicle 4 pivotally arranged tailgate 5 is in 2 shown in plan view from behind. The tailgate 5 has a frame 6 with a window recess in which a rear window 7 is arranged.

On the rear window there is a wiping field configured in a circular arc 8th , which by means of a rear window wiper 10 from impurities and dirt and splashing water can be freed. The rear window wiper 10 is one, based on the vehicle vertical axis (z) lower portion of the rear window 7 arranged. He can also be on the frame 6 below the rear window 7 be arranged. The rear window wiper 10 is located, based on a vehicle transverse direction (y) approximately centrally on the lower edge of the rear window 7 ,

At the in 2 shown rear of the vehicle 4 is also a camera 9 trained sensor arranged. The sensor or the camera 9 serves to take pictures of one behind the vehicle 1 lying area. The camera 9 is typically image-transmitting and data-related with a display, typically coupled to a screen, which in the vehicle interior 3 , For example, is provided in the area of an instrument panel. The structural design of the rear window wiper 10 goes out of the 3 and 4 out.

The rear window wiper 10 has a wiper shaft 12 on, passing through a passage opening 44 at the bottom of the rear window 7 passed through. That through-hole 44 is with a seal 46 Mistake. The wiper shaft 12 is by means of a drive 11 rotatably and reversibly mounted. The drive 11 is typically designed as an electric motor. At one in the outer area of the motor vehicle 1 lying end portion of the wiper shaft is a in 2 schematically illustrated wiper arm 14 arranged rotationally fixed. A reversing rotary motion of the wiper shaft 12 thus leads to a pendulum motion of the wiper arm 14 , On the wiper arm 14 is a wiper blade 15 arranged, which gives me an outside of the rear window 7 in contact. The typically provided with a rubber elastic wiper lip wiper blade 15 completes a swipe across the entire wiping field 8th and frees this from impurities and dirt.

The wiper shaft 12 is at least partially hollow. In the hollow area of the wiper shaft 12 runs a fluid line 16 , An upstream end of the fluid line 16 is with a feed pump 18 connected, which in turn with a fluid reservoir 20 is in flow communication. By activation of the feed pump is a in the fluid reservoir 20 provided cleaning fluid through the fluid line 16 which z. B. may be formed as a hose transported. The fluid line 16 has an outdoor area of the motor vehicle 1 lying outlet end 25 on. This is available with a first fluid outlet 22 and with a second fluid outlet 24 in fluid communication, as indicated by the in 3 shown schematically thick lines that symbolize a fluid flow.

The first fluid outlet 22 is on the swipe field 8th the rear window 7 directed. The second fluid outlet 24 is on the camera 9 directed. Since the camera, in the vehicle transverse direction (y) in the same position as the wiper shaft 12 is the second fluid outlet 24 directed downwards, while the first fluid outlet 22 up to above the wiper shaft 12 lying wiping field 8th is aligned.

From the cross section of 3 It can also be seen that the wiper arm 14 rotatably with the wiper shaft 12 connected is. In the present case is the wiper arm 14 outside on the wiper shaft 12 attached. By corresponding key surfaces or corresponding interlocking means here is a torque transmitting connection between the wiper shaft 12 and wiper arm 14 realized. Axially, the wiper arm 14 by means of a nut 42 at the wiper shaft 12 be fixed. The nut 42 typically stands with one outside on the wiper shaft 12 provided threaded portion 40 the wiper shaft 12 engaged.

The entire connection area of Wischarm 14 and wiper shaft 12 is in the embodiment according to 3 with a cover 30 Mistake. The cover 30 has an end baffle 31 as well as adjoining opposite side walls 32 . 34 on. The first side wall 32 is at the Wischfeld 8th facing side of the wiper arm 14 arranged while the second side wall 34 opposite, the camera 9 facing the wiper arm is arranged. First and second sidewalls 32 . 34 may also be formed as side wall portions of a continuous approximately cylindrically shaped side wall.

The cover 30 points next to the side walls 32 . 34 a frontally arranged baffle surface 31 on. The baffle 31 is located at a predetermined axial distance to outlet 35 the fluid line 16 , According to the geometric design and orientation of the baffle 31 can that from the feed pump 18 funded and via the fluid line 16 transported cleaning fluid, for example, at high speed on the baffle 31 and from there to the first and the second side wall 32 . 34 be directed. In the first sidewall 32 is a first passage opening 36 intended. In the second side wall 34 is a second passage opening 38 intended. The first passage opening 36 acts as the first fluid outlet 22 while the second through hole 38 as a second fluid outlet 24 acts.

A ray 50 a cleaning fluid, which via the fluid line 16 and about the outlet end 25 the fluid line 16 on the baffle 31 is directed, branches into at least two partial beams, namely in a first partial beam 52 and in a second sub-beam 54 , As in 3 shown, the first partial beam passes 52 through the first passage opening 36 , thus through the first fluid outlet 22 to the wiping field 8th the rear window 7 while the second sub-beam 54 through the second passage opening 38 , thus through the second fluid outlet 24 directed to the camera.

The functional extension of a rear window wiper described here 10 for additional cleaning on the outside of the vehicle 4 arranged camera 9 can in a particularly simple manner by providing a in 3 shown cover 30 with a first and a second passage opening 36 . 38 in combination with a coordinated impact surface 31 be achieved.

In 4 a further embodiment of the rear window wiper is shown schematically. In contrast to the embodiment according to 3 There are the first and second fluid outlets 22 . 24 as spray nozzles 26 . 28 designed, which has a T-shaped branch 29 the outlet end 25 the fluid line 16 both fluidly connected to each other and to the fluid line. The first spray nozzle 26 acts as the first fluid outlet 22 , The second spray nozzle 28 acts as a second fluid outlet 24 , Same as in 3 shown is the first spray nozzle 26 to the wiping field 8th the rear window 7 directed while the second spray nozzle 28 to the camera 9 is directed.

Downstream of the junction 29 indicates the fluid line 16 a first wiring harness 16a and a second fluid train extending in opposite or in a different direction 16b on. The first spray nozzle 26 is about the first fluid strand 16a with the branching 29 connected. The second spray nozzle 28 is over the second strand 16b with the branching 29 connected. The two strands of wire 16a . 16b can be designed substantially identical. But it is also conceivable that the line strands 16a . 16b have different cable cross-sections.

In this way you can with just a single pump 18 different amounts of cleaning fluid on the wiping field 8th and to the camera 9 be directed.

The illustrated embodiments show only possible embodiment of the invention to which further numerous variants are conceivable and within the scope of the invention. The exemplary embodiments shown are in no way to be construed as limiting the scope, applicability or configuration possibilities of the invention. The present description merely shows the person skilled in the art a possible implementation of an exemplary embodiment according to the invention. Thus, the most varied modifications can be made to the function and arrangement of elements described without departing from the scope of protection or its equivalents as defined by the following claims.

LIST OF REFERENCE NUMBERS

1

motor vehicle

2

body

3

inner space

4

vehicle rear

5

tailgate

6

frame

7

rear window

8th

wiping field

9

camera

10

rear window wiper

11

drive

12

wiper shaft

14

wiper arm

15

wiper blade

16

fluid line

16a

wiring harness

16b

wiring harness

18

feed pump

20

fluid reservoir

22

fluid outlet

24

fluid outlet

25

outlet

26

nozzle

28

nozzle

29

branch

30

cover

31

baffle

32

Side wall

34

Side wall

36

Through opening

38

Through opening

40

threaded portion

42

nut

44

Through opening

46

poetry

50

beam

52

partial beam

54

partial beam

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102006036359 A1 [0002]

Claims (14)

Rear window wiper for a motor vehicle, comprising: - an at least partially hollow wiper shaft ( 12 ), - a wiper arm ( 14 ), which rotatably with the wiper shaft ( 12 ) and which by means of the rotatably and reversibly driven wiper shaft ( 12 ) over a wiping field ( 8th ) a rear window ( 7 ) of the motor vehicle is movable, - at least one fluid line ( 16 ) which axially through the wiper shaft ( 12 ) and which with an outlet end ( 25 ) with a first fluid outlet ( 22 ) and with a second fluid outlet ( 24 ) is in flow communication. Rear wiper according to claim 1, wherein the first fluid outlet ( 22 ) and the second fluid outlet ( 24 ) are aligned in different directions. Rear window wiper according to claim 1 or 2, wherein the first fluid outlet ( 22 ) and the second fluid outlet ( 24 ) are aligned in diametrically opposite directions. Rear window wiper according to one of the preceding claims, wherein the first fluid outlet ( 22 ) on the wiping field ( 8th ). Rear window wiper according to one of the preceding claims, wherein the second fluid outlet ( 24 ) on at least one outside and at the rear ( 4 ) of the vehicle sensor ( 9 ) is aligned. Rear window wiper according to one of the preceding claims, at least one of first and second fluid outlet ( 22 . 24 ) a spray nozzle ( 26 . 28 ) or as a spray nozzle ( 26 . 28 ) is trained. Rear wiper according to one of the preceding claims, wherein both the first and the second fluid outlet ( 22 . 24 ) a spray nozzle ( 26 . 28 ) or as a spray nozzle ( 26 . 28 ) is trained. Rear window wiper according to claim 7, wherein the fluid line ( 16 ) at its outlet end Y-shaped or T-shaped in the first fluid outlet ( 22 ) and into the second fluid outlet ( 24 ) branches. Rear window wiper according to one of the preceding claims 1 to 6, further comprising a cover ( 30 ), which a connection area of the wiper arm ( 14 ) to the wiper shaft ( 12 ) at least partially encloses. Rear wiper according to claim 9, wherein the cover ( 30 ) axially spaced from the outlet end (FIG. 25 ) of the fluid line ( 16 ) an impact surface ( 31 ) for a fluid jet ( 50 ) having. Rear window wiper according to claim 16, wherein the cover ( 30 ) a first side wall ( 32 ) with a first passage opening ( 36 ) and a second side wall ( 34 ) with a second passage opening ( 38 ) having. Rear wiper according to claim 10 and 11, wherein the first and the second side wall ( 32 . 34 ) over the intermediate baffle surface ( 31 ) are interconnected. Rear window wiper according to one of the preceding claims 11 or 12, wherein the first fluid outlet ( 22 ) from the first passage opening ( 36 ) and wherein the second fluid outlet ( 24 ) from the second passage opening ( 38 ) is formed. Motor vehicle with a motor vehicle body ( 2 ), with at least one exterior on a vehicle rear ( 4 ) arranged sensor ( 9 ) and with a rear window wiper ( 10 ) according to any one of the preceding claims.

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