KR20070020429A - Windscreen wiper system for vehicles and fixing device for such a system - Google Patents

Abstract

In automotive windscreen wiper systems having three or more connecting devices or fixing devices spaced apart from each other for screwless mounting of the windscreen wiper system on the vehicle body, the fixing devices can be individually pressed into attachments or fixing holes. Consisting of fastening elements, which fastening elements can be fastened by engagement, the one or more fastening elements having a grommet of elastic material that can be inserted into an attachment or fastening hole, the grommet having one or more extensions acting as a catch It is designed to have wealth. In order to reduce the clamping force, one or more cavities are disposed radially inward in the grommet area, opposite the extensions relative to the grommet axis.

Fixture, wiper

Description

Windscreen wiper system for vehicle and fixing device for such system {WINDSCREEN WIPER SYSTEM FOR VEHICLES AND FIXING DEVICE FOR SUCH A SYSTEM}

The present invention relates to a windscreen wiper system for a vehicle, in particular for a road vehicle, according to the preamble of claim 1, and a fixing element for the windscreen wiper system according to the preamble of claim 17.

So-called wiping systems as Plug & Wipe are known, which wiping systems are mounted to the respective vehicle by means of fixtures or connections, and these fixtures and connections are of the windscreen wiper system or of this position. It consists of a peg-type fastening element on the carrier and an attachment or fastening hole on the vehicle or vehicle body side, in which the fastening element is fixed by inlet and engagement.

In particular in the case of this example, the peg-type fastening element consists of an elastic bush or grommet, which forms an axial contact surface with the flanged portion of the bush protruding beyond the circumference of the bush at one end of the bush, The other end of the catch is provided to protrude beyond the circumference of the bush. In this example, it is disadvantageous to securely secure the windscreen wiper system to the vehicle, which fixation prevents accidental detachment and removal during operation of the windscreen wiper, and in this case also requires necessary modification of the bush during installation. Due to this means a large fastening force is required.

It is an object of the present invention to solve the above-mentioned problems and to achieve fastening by high load bearing capacity with a small fastening force. In order to achieve this object, a windscreen wiper system according to claim 1 is designed. A fixing element for use with the windscreen wiper system is designed according to claim 17.

According to the design of the present invention, the advantage of more accurately independent of high load bearing capacity anchoring and fastening force is achieved and is due to one or more cutouts additionally provided in the bush or grommet opening. Thus, when the grommet is press-fitted into each attachment or fixing hole, a space is formed that can move sideways until the grommet of the desired material is engaged, which in turn enables high load bearing capacity to be fixed due to increased rigidity as well. It is possible to mount with less clamping force when using the grommet material, and the removal of each connection is possible only when using a force significantly greater than the force applied to the connection during normal operation of the windscreen wiper system.

The construction of the invention is disclosed in the dependent claims. The invention will be explained in more detail in the embodiments with reference to the accompanying drawings.

1 is a perspective view of a windscreen wiper system for a vehicle with a carrier mountable on the vehicle body by engagement;

2 is a cross-sectional view showing elements of the carrier fixing element, respectively, with fixing holes or attachments formed by passages in the vehicle bodywork;

3 is a sectional view of the fixing element of FIG. 2 with the carrier fixed to the vehicle body;

4 is a cross-sectional view separately showing a grommet formed of an elastic rubber material in the fixing element of FIGS. 2 and 3;

5 to 7 are views similar to those of FIGS. 2 to 4, showing an embodiment of the present invention.

In FIG. 1, a windscreen wiper system for an automobile has essentially a tubular carrier 2, as already known, an electric drive 3 laterally fixed to the carrier between both ends of the carrier, while an electric drive ( 3) has a winder on its own output shaft and two connecting rods 4, 5, which are hingedly coupled to the winder, one end of which is not shown in FIG. Articulated to (6, 7), additionally, wiper shaft bearings (8, 9) are arranged at both ends of the carrier, and one wiper shaft (10, 11) is rotatably installed. The wiper shaft 10 installed in the wiper bearing 8 is coupled to a motion link 6 projecting radially from the shaft, and the wiper shaft 11 installed in the wiper shaft bearing 9 radially from the shaft. It is coupled to the protruding motion link 7.

In order to fasten the windscreen wiper system and the carrier 2 to the seat 12 of the vehicle body, three fixing elements 13 are provided in the illustrated embodiment, each of which has the same structure. And fixing elements 13 corresponding to the vertices of the triangle are arranged spatially offset relative to each other. In this sense, two fixing elements 13 are located at the ends of the tubular carrier 12 and on the wiper shaft bearings 8, 9 above. The fastening element 13 is arranged on an additional carrier arm 14 protruding from the electric drive 3.

In the embodiment shown, both fixing elements 13 are arranged on the wiper shaft bearings 8, 9 and the joint level, each axis being approximately parallel to each other. At one end of the inclined carrier arm 14, the fixing element 13 is installed such that its axis is laterally or perpendicular to the level.

The peg-type fastening element 13 is axially inserted into the fastening opening defined by the passage 15 (in the example shown) and engaged in the passage 15 and the fastening opening 16 by the fastening element. All fixing elements 13 are designed to be able to mount the windscreen wiper system 1 and the carrier 2 respectively for the bodywork.

2 and 3 are enlarged cross sectional views of one of the fixing elements 13 together with a panel 12 and a passage 15 forming a fixing opening in such a panel.

Each fixing element 13 consists essentially of a peg 17, which is integrally molded on the wiper shaft bearings 8, 9 or otherwise formed by the end of the carrier arm 14. Starting from the wiper bearings 8, 9 or the carrier arm 14, the peg 17 firstly comprises a peg cutout 17.1 with an enlarged diameter and a portion with a reduced diameter in front of the cutout ( 17.2). In the peg portion 17.2, a circumferential groove 18 is formed, the width of which is almost the entire axial length of the peg portion 17.2, and the peg portion 17.2 with the circumferential groove 18 Its cross section is a mushroom-shaped peg with an extended peg end 17.3. The component part of each fastening element 13 is in turn a bush or grommet 19 made of a permanent elastic material, such as rubber or elastic plastic. The overall axial length of the grommet 19 is equal to or slightly larger than the width W of the groove 18. The diameter of the bush opening 20 of the grommet 19 is equal to or slightly smaller than the diameter in the groove 18 region of the peg portion 17.2. At one end of the grommet 19, a flange-shaped portion 21 having an expanded outer diameter is integrally formed and connected to the other end of the grommet by the portion 22, and the grommet 19 and the grommet 19 The cylindrical outer die surface has a smaller diameter than the size of the outer diameter of the portion 22 but is equal to or slightly larger than the diameter in the cross section of the opening 16. At the other end spaced from the flanged portion 21 of the grommet 19, a ring-shaped projection 23 is formed, which acts as a catch, which concentrically surrounds the axis AT of the grommet 19, and the portion ( It protrudes beyond the cylindrical outer peripheral surface of 22). On one side of the grommet opposite the flange portion 21, the protrusion 23 forms a constrained region 23.1 and a ring region 23.2 behind it and a grommet 19 on the opposite side spaced apart from the flange portion 21. To form an inclined cone region towards the neighboring end of

The ring-shaped groove or cutout 24 following the constrained region 23.1 concentrically encircles the axis of the grommet opening 20 as well as the grommet 19, and also extends to the extension below the protrusion 23, and the grommet 19 And a grommet portion 22 immediately adjacent to the circumferential surface and the constraining region 23.1. According to the elastic deformation of the radially inwardly extending extension 23 of the projection, the material of the grommet 19 displaced during this elastic deformation can be received by the cutout 24 so as to have an annular groove-shaped cutout. 24 is designed.

As shown in the figure, the volume V24 of the cutout 24 is at least equal to the volume V23 of the ring-shaped protrusion 23 protruding beyond the cylindrical circumferential region of the grommet portion 22, but preferably the volume V24. Selected slightly larger than volume.

Along with the pre-mounted fastening element 13, the grommet 19 is laid stationary against the axial displacement on the peg portion 17. 2, and substantially the grommet 19 is properly accommodated in the groove 18. Grommet portion 21 on the side of groove 18 adjacent to peg region 17.1 and ring-shaped projection on the side of groove 18 adjacent to peg end 17.3. The other ends of the grommet with 23 are fixedly placed to support each other. In this case, the outer diameter of the peg end 17.3 becomes smaller than the outer diameter of the grommet 19. In order to install the fixing element 13, the grommet 19 produced by an injection molding process, for example, is press-fitted onto the peg portion 17.2 or the first grommet 19 is peg-parted by a suitable method such as spraying. (17.2) is generated.

During mounting of the windscreen wiper system 1, each peg 17 with which the grommet 19 is engaged is inserted into the opening 16 of the passage 15, and the protrusion 23 first into the cutout 24. It is elastically urged radially inward over the truncated conical portion 23.4 and is received by the cutout, as long as the peg 17 together with the grommet 19 is not fully indented into the opening 16. The projections 23 are again present, ie the projections can move radially outwards, and at the same time the conduit 15 of the constriction region 23. It is engaged on the opposite surface, and consequently the windscreen wiper system 1 is held on the vehicle body by the engagement by the associated fastening element 13. The particular advantage of this fixing element 13 is that due to the proper selection of the material for the grommet, with a limited installation force, a secure fixing to each fixing opening 16 is achieved, despite the reduction in the fastening force, The windscreen wiper system and the carrier 2 of the system are securely held on the vehicle bodywork and do not cause disassembly of the wiper system, especially if the tightening force rises during operation of the windscreen wiper system.

5 to 7 show another implementable fixing element 13a which differs only in that it uses the grommet 19a instead of the grommet 19 in the fixing element 13. The grommet 19a is disposed on the grommet portions 21, 22 and the end of the grommet 19a and has a protrusion 23 having a constraining region 23.1, a cylindrical or ring region 23.2 and a conical region 23.3. It is provided. However, in the case of such grommet 19a, the cutout 24 of an annular groove form is abbreviate | omitted. Instead of this cutout 24, the grommet opening 20 is designed with a cutout 20.1 having an enlarged diameter so that it is more precise between both ends of the grommet 19a. In the embodied embodiment the portion 20.1 is roughly below the ring region 23.2 and the confinement region 23.1 and between the portion of the grommet portion 22 formed between the confinement region 23.1 and the grommet portion 21. Extend beyond the length. When the second grommet 19a is mounted on the peg portion 17.2, the peg portion presses the grommet portion 21 against the side of the groove 18 adjacent to the peg portion 17.1, and then the peg portion The other end of the grommet is pressed against the edge of the groove 18 adjacent to 17.3, and the portion 20.1 forms the cavity 25. The volume V25 of this cavity is selected at least equal to, preferably larger than, the volume V23 of the ring-shaped protrusion 23, and upon mounting of the windscreen wiper system 1 with the fixing element 13a. And, when inserting each fixing element 13a into the fixing opening 16 of each protrusion 23, radially inward displacement is possible, in reality the reception of the grommet volume being fixed by the passage 15. It is displaced in the cutout 25 until the insertion of the fastening element 13a into the opening 16 is complete and the projection can return to its initial position radially outward, so that it can be gripped from the rear to Engage at the edge surrounding the opening 16. Even in this embodiment, due to the portion 20.1 and the cavity 25, high load bearing capacity fixing is achieved even with limited clamping force.

In both embodiments, the axial spacing between the constrained region 23.1 and the side of the grommet portion 21 opposite the constrained region is approximately equal, preferably somewhat, to the axial dimension A of the passage 15. The grommet 19, 19a is individually designed so that the windscreen wiper system 2 can be mounted on the vehicle body without clearance, particularly through elastic deformation of the grommet portion 21.

The present invention has been described based on the embodiments. It is to be understood that modifications and variations of the present invention are possible without departing from the spirit upon which the present invention is based. Thus, for example, on the vehicle body, on the frame of the vehicle, or on the retaining device in this position, the fixing elements 13, 13a or similar fixing elements are placed and correspond on the windscreen wiper system or on the carrier It is possible to arrange attachments or fixing holes. Combinations such as arranging a part of the fastening element on the windscreen wiper system and arranging a part of the fastening element on the body of the vehicle or on the carrier in this position are also possible.

Claims (30)

A windscreen wiper system for a vehicle, in particular an automobile, comprising at least three connections or fixtures spaced apart from each other to screwlessly mount the windscreen wiper system 1 or the carrier 2 of the system on a vehicle body. The fastening part consists of fastening elements 13 and 13a which can be led into an attaching part or fastening hole 16 which can be fastened by engagement, respectively, and at least one fastening element can be inserted into the fastening part or fastening hole. Designed to have at least one protrusion 23 which acts as a catch and has grommet 19, 19a of resilient material, On the grommet in the region of the protrusion 23, at least one cavity 24, 25 for the vehicle is disposed radially inwardly opposite the protrusion relative to the grommet axis AT. system. 2. A windscreen wiper system according to claim 1, characterized in that the cavity is a cutout (24) in the form of a cutout, for example a circular groove. 3. A windscreen wiper system according to claim 2, characterized in that the cavity is a cutout (24) open towards the circumference of the grommet (19). 4. Windscreen wiper system according to any one of the preceding claims, characterized in that the cavity (24) has an extension extending under at least one protrusion (23). 5. The windscreen wiper system for an automobile according to claim 1, wherein the cavity 24 on the circumferential region of the grommet 19 is opened near the constrained region 23. . 6. The windscreen wire system of claim 1, wherein the at least one extension is an annular extension (23) which concentrically surrounds the axis (AT) of the grommet. 7. Windscreen wire system according to any one of the preceding claims, characterized in that the cavity (25) is formed by a portion (20.1) of the grommet opening having an enlarged cross section. 8. Windscreen wire system for an automobile according to any of the preceding claims, characterized in that the grommet (19, 19a) is made of an elastic rubber material, such as rubber or rubber plastic. 9. The grommet 19, 19a forms an additional contact surface 21 axially spaced apart from the one or more restrained regions 23.1, and these on the grommet side. The axial distance between the additional contact surface 21 and the at least one restraint region 23.1 is characterized by a first surface that is gripped from behind an attachment or fixation hole 16 formed by the restraint region 23.1 and the grommet side surface. A windscreen wire system for a differential vehicle, characterized in that it is less than or equal to the axial spacing between a second surface formed in an attachment hole or fixing hole (16) placed against an additional contact surface on (21). 10. Windscreen wire system according to claim 9, characterized in that the further contact surface on the grommet side is formed by a flanged grommet area (21) which projects beyond the circumference of the grommet. The grommet 19, 19a is arranged such that no axial displacement is possible on the pegs 17 of the fastening elements 13, 13a or on the parts 17.2 of the pegs. Automotive windscreen wire system, characterized in that the. 12. The grommet (19, 19a) of claim 11 is protected by a back cut between the peg (17) and the grommet (19, 19a) axially on the peg (17). Automotive windscreen wire system, characterized in that. 13. Windscreen wire system according to claim 12, characterized in that the pegs (17) or portions of the pegs (17.2) have at least one groove (18) for receiving the grommet (19). 14. The fixing element (13, 13a) according to any one of the preceding claims, wherein the fixing elements (13, 13a) are partly in the region of the windscreen wiper system (1) or the elements (8, 9, 14) of the windscreen wiper system (1). Windscreen wire system for automobiles, characterized in that a corresponding fixing or attachment opening is arranged on the side of the vehicle body. The windshield wiper system (1) according to any one of the preceding claims, wherein the fastening elements (13, 13a) are at least partially disposed on the vehicle body side, and the corresponding fastening or attachment openings (16) are on the windscreen wiper system (1). A windscreen wire system for an automobile, characterized in that it is arranged on or on the functional elements (8, 9, 14) of the windscreen wiper system (1). 16. The vehicle according to claim 1, wherein the volumes V24, V25 of the one or more cavities 24, 25 are at least equal to the volume 23 of the projection 23. Windscreen wire system. As a fastening element for screwless mounting a vehicle, in particular a windscreen wiper system 1 for a vehicle, or a carrier 2 of the system, on a vehicle body, The fastening elements 13, 13a can be pressed into the attachment part or the fastening hole 16 and fixed in position by engagement, which fastening elements have grommet 19, 19a made of an elastic material, The grommet can be inserted into an attachment or fixing hole and is designed to engage one or more protrusions 23 that act as catches, On the grommet in the region of the projection (23), at least one cavity (24, 25) is arranged radially inwardly opposite the projection relative to the grommet axis (AT). 18. A fastening element according to claim 17, characterized in that the cavity is a cutout (24) in the form of a cutout, for example a circular groove. A fastening element according to claim 18, characterized in that the cavity is a cutout (24) open towards the circumference of the grommet (19). 20. A fastening element according to any one of claims 17 to 19, characterized in that the cavity (24) has an extension extending under at least one protrusion (23). 21. The stationary element according to claim 17, wherein the cavity (24) on the circumferential region of the grommet (19) is opened near the constrained region (23.1). A fastening element according to claim 17, wherein the one or more extensions are annular extensions (23) which concentrically enclose the axis (AT) of the grommet. 23. A fastening element according to any one of claims 17 to 22, characterized in that the cavity (25) is formed by a portion (20.1) of the grommet opening having an enlarged cross section. 24. A fastening element according to any one of claims 17 to 23, characterized in that the grommet (19, 19a) is made of an elastic rubber material, such as rubber or rubber plastic. 25. The grommet 19, 19a forms an additional contact surface 21 axially spaced from one or more restraint regions 23.1, and these additions on the grommet side. The axial distance between the contact surface 21 of the at least one restraint region 23.1 is the first surface gripped from behind the attachment or fixing hole 16 formed by the restraint region 23.1 and the grommet side surface 21. A fastening element, characterized in that it is less than or equal to the axial spacing between a second surface formed in the fastening hole (16) or an attachment placed abutting on an additional contact surface on the surface. A fastening element according to claim 25, characterized in that an additional contact surface on the grommet side is formed by a flanged grommet area (21) which projects beyond the circumference of the grommet. 27. The grommet 19, 19a is arranged such that no axial displacement is possible on the pegs 17 of the fastening elements 13, 13a or on the parts 17.2 of the pegs. Fixed element characterized in that the. 28. The grommet (19, 19a) of claim 27 is protected by a back cut between the peg (17) and the grommet (19, 19a) axially on the peg (17). A stationary element, characterized in that. 29. A fastening element according to claim 28, wherein the pegs (17) or portions of the pegs (17.2) have at least one groove (18) for receiving the grommet (19). 30. The stationary element according to claim 17, wherein the volumes V24, V25 of the one or more cavities 24, 25 are at least equal to the volume 23 of the protrusion 23. .

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