Hydraulic and / or pneumatic connecting component, especially for a motor vehicle, wiper arm and wiper

Abstract

Hydraulic and / or pneumatic connecting component (8) for a hydraulic and / or pneumatic interface (10) between a wiper blade (3) and a wiper arm (2) of a wiper (1), which is particularly suitable for a motor vehicle (4), wherein a hose connection (25) is provided for a hydraulic and / or pneumatic line (11) of the wiper (1) and wherein a first coupling piece (26) is provided on which the hydraulic and / or pneumatic interface (10) is provided.It is proposed that a second coupling piece (27) be provided, which serves at least as a mechanical interface (9), that a hydraulic and / or pneumatic line piece (30) be provided between the hose connection (25) and the first coupling piece (26), and that an angle (35) greater than 0° and less than 90° is specified between the line piece (30) and a base direction (31) pointing from the first coupling piece (26) to the second coupling piece (27). Furthermore, a wiper arm (2) and a wiper (1) are specified.

Description

State of the art

[0001] The invention relates to a hydraulic and / or pneumatic connecting component for a wiper arm, which is particularly suitable for a motor vehicle, as well as a wiper arm and a wiper with such a connecting component. Specifically, the invention relates to the field of wipers, in particular windshield wipers, for passenger cars and / or trucks.

[0002] From DE 10 2019 217 192 A1, a windshield wiper, particularly suitable for the windshield of a motor vehicle, is known. This wiper comprises a wiper arm, a wiper blade, and a fluid reservoir. In this context, a wiper blade adapter device is known, comprising a fluid channel for conveying a fluid and a connection unit for a fluid-technical connection between the fluid channel and a wiper arm. Disclosure of the invention

[0003] The connecting component according to the invention, with the features of the main claim, has the advantage that improved design and functionality are possible. In particular, fluid guidance can be improved, manufacturing can be simplified, and / or assembly can be simplified. Corresponding advantages can be achieved for the wiper arm according to claim 9 and the wiper according to claim 10.

[0004] The measures listed in the dependent claims result in further advantageous developments and improvements of the features specified in the main claim.

[0005] It is advantageous if the angle is greater than 10°, particularly greater than 20°, and especially greater than 25°. This allows for a more compact and / or simplified design. Additionally, it enables improved fluid flow. Furthermore, it allows for a design without additional components, such as sealing spheres.

[0006] It is advantageous that the angle is less than 50°, particularly less than 40°, and especially less than 35°. This allows for a compact and / or simplified design. Additionally, improved fluid flow can be achieved. Furthermore, a design without additional components, such as sealing spheres, is possible.

[0007] It is advantageous that the angle is at least approximately 30°. This allows for a compact and / or simplified design. Additionally, it enables improved fluid flow. Furthermore, it allows for a design without additional components such as sealing spheres.

[0008] A key advantage is that the second coupling piece does not form a hydraulic and / or pneumatic interface. This allows it to serve as a mechanical fastening element. Additionally, this facilitates efficient fluid flow.

[0009] The advantage lies in the fact that the second coupling piece forms a purely mechanical interface. This allows for efficient fluid flow via the first coupling piece combined with a secure connection via the second coupling piece, resulting in overall high reliability of the connection.

[0010] It is advantageous that a base bridge, at least mechanical, and in particular purely mechanical, is formed between the first and second coupling pieces, connecting them. This ensures high stability and allows for high load-bearing capacity with a compact design.

[0011] It is advantageous that a connecting arm, particularly a connecting arc, is formed between the pipe section and the second coupling piece, at least mechanically, and in particular purely mechanically, connecting the pipe section and the second coupling piece. This improves mechanical stability. Additionally, a compact design can be achieved.

[0012] It is advantageous that the connecting arm, especially the connecting elbow, is connected to the pipe section at least approximately midway between the hose connection and the first coupling. This improves mechanical stability. Additionally, a more compact design can be achieved.

[0013] It is advantageous that the first coupling piece has a hydraulic and / or pneumatic bore and that the bore of the first coupling piece is oriented at least approximately perpendicular to the pipe section. This enables advantageous fluid flow.

[0014] It is advantageous that the first coupling piece is oriented at least approximately perpendicular to the pipe section and that the second coupling piece is oriented at least approximately parallel to the first coupling piece. This ensures high mechanical stability of the connection.

[0015] It is advantageous if the connecting component is at least essentially a single piece and / or at least essentially made of plastic, in particular an injection-molded part. This allows for simple and / or cost-effective manufacturing.

[0016] Depending on the design, one or more of the following features and advantages may be realized.

[0017] A hydraulic connection can be implemented that is simple in design and / or easy to manufacture. In particular, sealing balls can be omitted.

[0018] It is conceivable that a connecting component has several straight pipe sections, each forming a 90° angle with the others. Together with a base bridge and a straight stiffening rib, a rectangular structure can be achieved, for example, with coupling pieces oriented at 90° angles to the rectangular structure at both corners of the base bridge.

[0019] The pipe sections of this conceivable design may, for example, have additional openings beyond those required for the hydraulic connection, due to the manufacturing process. These additional openings can occur, for instance, if the pipe sections are drilled from the outside. These additional openings must then be closed or sealed.

[0020] This could be achieved, for example, by means of a sealing ball and corresponding screwed-on or otherwise attached bearing rings, which are attached to the connecting component and each provide a sealing seat for the associated sealing ball.

[0021] Compared to this conceivable design, the proposed design offers significant advantages, as mentioned above or below.

[0022] The elimination of sealing balls and related components such as bearing rings simplifies the design. In particular, elements like the sealing balls can be omitted. This also reduces the number of assembly steps during manufacturing. The design can be further simplified by reducing the number of required holes. For example, only three holes may be needed instead of five.

[0023] The term "bore" is to be understood broadly here and also includes bores produced by means other than machining processes. Furthermore, bores can also be created, for example, by inserts such as sleeves.

[0024] Specifically, this application is suitable for wipers with heated fluid guides. However, it can also be used with wipers without heating.

[0025] Furthermore, the advantageous orientation of the conduit for the fluid can improve fluid flow. For example, turbulence can be reduced.

[0026] The proposed design achieves at least essentially the same stability as the aforementioned conceivable design with a rectangular structure. In particular, the proposed design, and any further advantageous developments thereof, achieves at least essentially the same torsional stiffness as the conceivable design with the rectangular structure described above. Brief description of the drawings

[0027] Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with matching reference numerals. The drawings show: Fig. 1. A wiper with a wiper arm for a motor vehicle in an excerpted, schematic representation; Fig. 2 a wiper arm adapter for the in Fig. 1. The wiper arm of the wiper shown in a schematic, three-dimensional representation, showing a base body, a holding piece and a connecting component; and Fig. 3 that in Fig. 2 Connecting components shown in a schematic, spatial representation. Embodiments of the invention

[0028] Fig. Figure 1 shows a wiper 1 with a wiper arm 2 and a wiper blade 3 for a motor vehicle 4 in an abridged, schematic representation. For the sake of simplicity, only a schematic edge 4' of a windshield 4" of the motor vehicle 4 is shown. The motor vehicle 4 can be, in particular, a passenger car or a truck. The wiper arm adapter 1 is especially suitable for such motor vehicles 4.

[0029] Fig. Figure 2 shows a wiper arm adapter 5 for the in Fig. Figure 1 shows a schematic, three-dimensional representation of the wiper arm 2 of the wiper 1. The wiper arm adapter 5 has a base body 6. The wiper arm adapter 5 also has a retaining piece 7 to which a hydraulic and / or pneumatic connecting component 8 is attached.

[0030] Interfaces 9 and 10 are implemented on the connecting component 8. Interface 10 is a hydraulic and / or pneumatic interface. Interface 9 is a purely mechanical interface.

[0031] The connecting component 8 is connected to a hydraulic and / or pneumatic line 11 on the wiper arm side. Fluid can be supplied to the connecting component 8 via the line 11 on the wiper arm side. In particular, an aqueous cleaning fluid or wiper solution can be used as the fluid.

[0032] Furthermore, a fluid guide 12 on the wiper blade side is provided, which is connected to the fluid line 11 on the wiper arm side at least by means of the connecting component 8 of the wiper arm 2. A hydraulic and / or pneumatic connection from the connecting component 8 of the wiper arm 2 to the wiper blade 3 can be made at the hydraulic and / or pneumatic interface 10. Mechanical stability is improved by the mechanical interface 9.

[0033] On the base body 6, a bearing element 15, designed in this embodiment as a bearing pin 15, is provided, on which the wiper blade 3 is rotatably mounted.

[0034] The base body 8 has a first side wall 16 and a second side wall 17. The retaining piece 7 is connected to the side walls 16 and 17 of the base body 8. The retaining piece 7 holds the connecting component 8.

[0035] Fig. 3 shows this in Fig. The connecting component 8 shown in Figure 2 is depicted in a schematic, three-dimensional representation. The hydraulic and / or pneumatic connecting component 8 serves to implement the hydraulic and / or pneumatic interface 10 between the wiper blade 3 and the wiper arm 2 of the wiper 1.

[0036] For this purpose, the connecting component 8 has a hose connection 25 for the hydraulic and / or pneumatic line 11 of the wiper 1. The connecting component 8 has a first coupling piece 26 on which the hydraulic and / or pneumatic interface 10 is provided.

[0037] Furthermore, the connecting component 8 has a second coupling piece 27, which in this embodiment serves as a mechanical interface 9. The second coupling piece 27 preferably forms a purely mechanical interface 9. The connecting component 8 also has a hydraulic and / or pneumatic line section 30, which is provided between the hose connection 25 and the first coupling piece 26.

[0038] An angle 35 is defined between the conductor section 30 and a base direction 31 extending from the first coupling section 26 to the second coupling section 27. The angle 35 is greater than 0° and less than 90°. Specifically, the angle 35 is greater than 10°, particularly greater than 20°, and further, particularly greater than 25°. Furthermore, the angle 35 can be specifically less than 50°, particularly less than 40°, and further, particularly less than 35°. In a particularly preferred embodiment, the angle 35 is at least approximately equal to 30°.

[0039] A base bridge 36 is formed between the first coupling piece 26 and the second coupling piece 27, mechanically connecting the first coupling piece 26 and the second coupling piece 27. The base bridge 36 is formed along the base direction 31.

[0040] Furthermore, a connecting arm 40 is formed between the pipe section 30 and the second coupling piece 27, which in this embodiment is designed as a connecting arc 40. The connecting arm 40 connects the pipe section 30 and the second coupling piece 26 to each other. Preferably, the connecting arm 40 is connected to the pipe section 40 approximately centrally between the hose connection 25 and the first coupling piece 26.

[0041] The first coupling piece 26 has a hydraulic and / or pneumatic bore 42 ( Fig.2) Furthermore, the bore 42 of the first coupling piece 26 is oriented perpendicular to the conductor piece 30, as illustrated by the arrow 43, which points in the direction of the bore 42. In this embodiment, the arrow 43 is also perpendicular to the base direction 31. The first coupling piece 26 is also oriented perpendicular to the conductor piece 30. Furthermore, the second coupling piece 27 is oriented parallel to the first coupling piece 26.

[0042] In one possible embodiment, the connecting component 8 is formed in one piece. The connecting component 8 can be made of plastic, in particular injection-molded plastic.

[0043] Thus, a wiper arm 2, which serves a motor vehicle 4, can be realized, wherein the hydraulic and / or pneumatic line 11 is mounted on the hose connection 25 of the connecting component 8. Similarly, a wiper 1 can be realized, which has a wiper arm 2 and a wiper blade 3 attached to the wiper arm 2, wherein a wiper blade-side fluid guide 12 is connected to the hydraulic and / or pneumatic line 11 of the wiper arm 11 by means of the connecting component 8 of the wiper arm 2.

[0044] The invention is not limited to the described embodiments. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2019 217 192 A1

[0002]

Claims

[1] Hydraulic and / or pneumatic connecting component (8) for a hydraulic and / or pneumatic interface (10) between a wiper blade (3) and a wiper arm (2) of a wiper (1), which is used in particular for a motor vehicle (4), wherein a hose connection (25) is provided for a hydraulic and / or pneumatic line (11) of the wiper (1) and wherein a first coupling piece (26) is provided on which the hydraulic and / or pneumatic interface (10) is provided, characterized by, that a second coupling piece (27) is provided which serves at least as a mechanical interface (9), that a hydraulic and / or pneumatic line piece (30) is provided between the hose connection (25) and the first coupling piece (26), and that an angle (35) is specified between the line piece (30) and a base direction (31) pointing from the first coupling piece (26) to the second coupling piece (27), which is greater than 0° and less than 90°. [2] Hydraulic and / or pneumatic connecting component according to claim 1, characterized by , a) that the angle (35) is greater than 10°, in particular greater than 20°, and further in particular greater than 25°, and / or b) that the angle (35) is less than 50°, in particular less than 40°, and further in particular less than 35°, and / or c) that the angle (35) is at least approximately equal to 30°. [3] Hydraulic and / or pneumatic connecting component according to claim 1 or 2, characterized by , that the second coupling piece (27) forms a purely mechanical interface (9). [4] Hydraulic and / or pneumatic connecting component according to any one of claims 1 to 3, characterized by , that between the first coupling piece (26) and the second coupling piece (27) an at least mechanical, in particular purely mechanical, base bridge (36) is formed, which connects the first coupling piece (26) and the second coupling piece (27) at least mechanically, in particular purely mechanically. [5] Hydraulic and / or pneumatic connecting component according to any one of claims 1 to 4, characterized by, that between the conduit piece (30) and the second coupling piece (27) an at least mechanical, in particular purely mechanical, connecting arm (40), in particular connecting arc (40), is formed which connects the conduit piece (30) and the second coupling piece (26) at least mechanically, in particular purely mechanically. [6] Hydraulic and / or pneumatic connecting component according to claim 5, characterized by , that the connecting arm (40), in particular connecting bend (40), is connected to the pipe section (40) at least approximately in the middle between the hose connection (25) and the first coupling piece (26). [7] Hydraulic and / or pneumatic connecting component according to any one of claims 1 to 6, characterized by , a) that the first coupling piece (26) has a hydraulic and / or pneumatic bore (42) and that the bore (42) of the first coupling piece (26) is oriented at least approximately perpendicular to the pipe section (30) and / or b) that the first coupling piece (26) is oriented at least approximately perpendicular to the line piece (30) and that the second coupling piece (27) is oriented at least approximately parallel to the first coupling piece (26). [8] Hydraulic and / or pneumatic connecting component according to any one of claims 1 to 7, characterized by that the connecting component (8) is at least substantially one-piece and / or at least substantially designed as a plastic part, in particular an injection-molded part. [9] Wiper arm (2), in particular for a motor vehicle (4), comprising a hydraulic and / or pneumatic connecting component (5) according to one of claims 1 to 8 and a hydraulic and / or pneumatic line which is mounted on the hose connection of the connecting component (8). [10] Wiper (1) with at least one wiper arm (2) according to claim 9 and at least one wiper blade (3) attached to the wiper arm (2), wherein at least one wiper blade-side fluid guide (12) is provided which is connected at least by means of the connecting component (8) of the wiper arm (2) to the hydraulic and / or pneumatic line (11) of the wiper arm (11).

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