CN104249709B

CN104249709B - Drive mechanism for a windscreen wiper device

Info

Publication number: CN104249709B
Application number: CN201410353993.0A
Authority: CN
Inventors: B·巴拉斯
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2013-06-25
Filing date: 2014-06-24
Publication date: 2020-04-03
Anticipated expiration: 2034-06-24
Also published as: FR3007358B1; DE102013212045A1; CN104249709A; FR3007358A1

Abstract

The invention relates to a drive mechanism for a windscreen wiper device, comprising a connecting piece for connecting to a vehicle body on a component of the drive mechanism, wherein the connecting piece is held adjustably.

Description

Drive mechanism for a windscreen wiper device

Technical Field

The invention relates to a drive mechanism for a windscreen wiper device in a vehicle.

Background

Drive mechanisms for window wipers in vehicles are known, which have an electric drive motor which sets a driven shaft in a rotary motion via a transmission. The output shaft is connected via a crank lever to two wiper shafts on which wiper arms are arranged. The wiper shaft and the wiper arm are set in a rotary oscillating movement by the crank lever. Such a windshield wiper device is described, for example, in DE 102006027345 a 1.

Disclosure of Invention

The object of the present invention is to provide a drive mechanism for a windshield wiper device in a vehicle, which is flexible in use.

According to the invention, this object is achieved by a drive mechanism for a windshield wiper device in a vehicle. This solution and its advantageous improvements are given below.

The drive mechanism is used in a window wiper device in a vehicle, by means of which a window, for example a front window or a rear window, is cleaned. The drive mechanism comprises an electric drive motor which drives a shaft, which is the carrier of the wiper arm supported on the window pane to be cleaned, by means of a connecting rod. By means of the connecting rod, the rotary drive movement of the drive motor is converted into a rotary oscillating movement of the shaft with the wiper arm.

The drive mechanism is held on the vehicle body. In an embodiment according to the invention, the separately constructed connection is adjustably held on a component of the drive mechanism. By means of which the relevant components of the drive mechanism are coupled to the vehicle body. This makes it possible to provide a uniform drive for window wipers mounted in different vehicle bodies. By means of a matching connection, the drive can be used in different vehicle body types with correspondingly different connection points. Thus, the adaptation to different vehicle bodies can be achieved only by means of the connecting element. In contrast, no changes are required to the geometry of the drive mechanism or to the connection points on the vehicle body.

The adjustability of the connecting element on the component of the drive means provides an additional degree of freedom which can be used for adapting and connecting the drive means to the vehicle body. Different distances between the drive mechanism and the connection point on the vehicle body can be overlapped by corresponding rotational adjustment or translational adjustment of the connecting piece on the component of the drive mechanism.

In the embodiment of a drive mechanism having a connecting rod for transmitting a drive movement between a drive motor or a downstream transmission and a shaft with a wiper arm, the wiper bearing housing is located at a relatively large lateral distance from the drive motor and is directly connected to the vehicle body.

The connection between the connecting element and the component of the drive mechanism is advantageously realized by a carrier which is formed separately from the component of the drive mechanism and on which the connecting element is held adjustably. As long as the attachment element is connected to the wiper bearing housing, the carrier element is preferably designed in one piece with the wiper bearing housing and extends in particular transversely to the longitudinal axis of the shaft in the wiper bearing housing. The relatively large static and dynamic forces which have to be absorbed by the wiper bearing housing during the wiping process can be transmitted further to the vehicle body via the carrier and the connecting element.

The adjustment movement between the connecting element and the component of the drive mechanism is in particular a rotational or swiveling movement, by means of which the angle between the connecting element and the component of the drive mechanism can be adjusted. Translational displacement movements between the connecting piece and the component of the drive mechanism can also be considered.

According to a further advantageous embodiment, the connecting elements can be fixed in a desired relative position on the components of the drive mechanism. This makes it possible to take up the desired relative position between the connecting element and the component of the drive mechanism and subsequently fix the connecting element in the desired relative position on the component of the drive mechanism. The fixing is effected by known fixing means, for example by screws. By fixing, the relative degrees of freedom between the links and the members of the drive mechanism are constrained.

According to an alternative embodiment, no fixing is made between the connecting piece and the components of the drive mechanism, but the relative movement is also retained in the assembled state. The components of the drive mechanism are held or fixed on the vehicle body transversely to the direction of movement of the coupling by the coupling.

In the case of a possibility of relative swiveling movement, the connecting element is advantageously coupled to a component of the drive mechanism by means of a hinge.

According to a further advantageous embodiment, the connecting element has both a pendulous mobility and a translatory adjustment capability with respect to the components of the drive mechanism. All relative movement possibilities can be bound by fixing means, for example screws, if necessary.

The carrier coupling the connecting part with the component of the drive can have a flat supporting surface on which, if appropriate, form-locking elements are arranged, so that the connecting part can be coupled with the drive in a form-locking manner. Corresponding form-locking elements can also be arranged on the connecting piece, which form-locking elements are in a latching position with the form-locking elements on the carrier. The form-locking elements are, for example, latching elements which can be latched to one another in different angular positions. The detent elements achieve a defined relative angular position in the event of a relative pivoting movement between the connecting element and the drive. The other adjustment to the possibility of relative movement is eliminated by the form-locking or latching position.

The drive mechanism is a component of a window wiper device in a vehicle, which is preferably used as a windshield wiper. But can in principle also be used as a rear window wiper.

Drawings

Further advantages and advantageous embodiments can be gathered from the description of the figures and the attached drawings. In the drawings:

fig. 1 shows a perspective view of a windscreen wiper device having a drive mechanism, which includes an electric drive motor, the operating movement of which is transmitted via a transmission to a driven shaft, which drives a motor crank, the movement of which is transmitted via a connecting rod to a wiper shaft, on which a wiper arm can be fastened,

fig. 2 shows a side view of a wiper bearing housing for receiving a wiper shaft, which has an attachment piece which is pivotably held on a carrier which is designed in one piece with the wiper bearing housing,

figure 3 shows the wiper support housing including the attachment piece in a top view,

figure 4 shows the wiper support housing and the attachment piece in a perspective view,

figure 5 shows the connecting element in a bottom view,

figure 6 shows a wiper bearing housing with an attachment piece in an angularly deflected position,

fig. 7 shows a view corresponding to fig. 6, but with a connection piece of an elongated design.

Like components in the figures are provided with the same reference numerals.

Detailed Description

The window wiper device shown in fig. 1 for cleaning a window pane comprises a drive 1 having an electric drive motor 2 which drives a driven shaft, to which a motor crank 4 is fastened, via a gear mechanism in a gear mechanism housing 3. The motor crank 4 is coupled to a crank linkage 5, by means of which two wiper shafts 6, which are arranged opposite each other and are each carriers of a wiper arm, are set in an oscillating rotational motion. The wiper shafts 6 are each rotatably accommodated in a wiper bearing housing 7, on which a carrier 8 is formed, by means of which the wiper bearing housing 7 is connected to the vehicle body.

Fig. 2 shows a side view of the wiper bearing housing 7 in a single illustration. A wiper shaft 6 is depicted in a schematic manner, which is rotatably accommodated in a wiper bearing housing 7 and carries a wiper arm 9.

As is apparent from fig. 2 in conjunction with the further figures, the carrier 8 is formed separately from the wiper bearing housing 7 and extends transversely to the longitudinal axis or rotational axis 10 of the wiper shaft 6 in the wiper bearing housing 7.

The carrier 8 accommodates an attachment element 11 which is formed separately from the wiper bearing housing 7 and the carrier 8 and is connected to the carrier 8 by means of a fastening element 12. The fastening elements 12 are configured as bolts or screws and project through recesses which are flush with one another and are introduced into the carrier 8 and the connecting piece 11. The fastening element 12 forms a hinge and enables a relative pivoting movement between the connecting piece 11 and the carrier 8 for determining a relative angular position in which the connecting piece 11 is fastened to the carrier 8. The connecting element 11 furthermore has a recess 13, by means of which a connection to the vehicle body is made. Other connecting or fastening elements for connection to the vehicle body can be guided through the recess 13, for example.

The pivot axis about which the attachment piece 11 can pivot relative to the carrier 8 extends parallel to the axis of rotation 10 of the wiper shaft 6 in the wiper bearing housing 7. The pivot axis of the connecting element 11 is defined by a bolt-shaped or screw-shaped fastening element 12, which forms a joint and by means of which the connecting element 11 is connected to the carrier 8.

The determination of the relative angular position between the connecting element 11 and the carrier 8 is effected in a snap-lock or form-fit manner. On the sides of the carrier 8 and the connecting element 11 facing each other, latching or form-locking

elements

14, 15 are arranged, respectively, which surround corresponding recesses through which the screw-like or screw-like fastening elements 12 are guided. The latching

elements

14, 15 are designed as individual, radially extending elevations which surround the respective recesses. In the assembled state, the latching

elements

14, 15 latch into one another, so that the connecting element 11 is connected to the carrier 8 in a form-fitting or latching manner in the direction of rotation or pivoting. The securing element 12 ensures that the connecting element 11 cannot be inadvertently released axially from the carrier 8.

As is apparent from fig. 6 and 7, the connecting pieces 11 can be fixed to the carrier 8 in different angular positions α the length L of the connecting piece 11 between the pivot axis on the carrier 8 and the center point of the other recess 13 of the connecting piece 11 for achieving a fixation on the vehicle body can be determined depending on the installation situation by selecting the respective connecting piece 11.

Claims

1. Drive mechanism for a windscreen wiper device in a vehicle, having a shaft rotatably accommodated in a wiper bearing housing (7), which carries a wiper arm (9), characterized in that a connecting element (11) for connecting to a vehicle body is arranged on a component of the drive mechanism (1), wherein the connecting piece (11) is adjustably held on the component of the drive mechanism (1), wherein the connecting piece (11) is connected with the driving mechanism (1) through a bearing piece (8), and wherein form-locking elements are arranged on the connecting pieces (11) and on the carriers (8), the form-locking elements are designed as latching elements (14, 15) which can be latched to one another in different angular positions, wherein the latching elements (14, 15) are designed as individual, radially extending elevations.

2. The drive mechanism as claimed in claim 1, characterized in that the component of the drive mechanism (1) on which the attachment element (11) is held adjustably is a wiper bearing housing (7).

3. The drive mechanism according to claim 1 or 2, characterized in that the connecting piece (11) can be fixed in at least two different relative positions on the component of the drive mechanism (1).

4. The drive mechanism according to claim 1 or 2, characterized in that the connecting piece (11) is arranged swingably on the member of the drive mechanism (1).

5. The drive mechanism as claimed in claim 1 or 2, characterized in that the carrier (8) is constructed separately from the components of the drive mechanism (1), the connecting piece (11) being held adjustably on the carrier (8).

6. The drive mechanism as claimed in claim 5, characterized in that the carrier (8) extends transversely to the longitudinal axis of a shaft in the wiper bearing housing (7).

7. The drive mechanism as claimed in claim 5, characterized in that the carrier (8) has a flat support face on which the connecting piece (11) is supported.

8. The drive mechanism according to claim 1 or 2, characterized in that the connecting piece (11) is held on the component of the drive mechanism (1) in a form-fitting manner.

9. Windscreen wiper device in a vehicle, having a drive mechanism (1) according to any one of claims 1 to 8.