Wiper blade device and wiper

Abstract

The invention is based on a wiper blade device for a wiper (10), in particular a windscreen wiper, having at least one wiper lip (12) which is designed to be moved over a window (14), in particular a vehicle window, and which forms at least one head strip (16), having at least one spoiler (22) which is designed to deflect an air flow, having at least one spring rail (18) which is designed to stiffen the wiper lip (12) and which is designed to fix the spoiler (22) to the wiper lip (12), wherein the head strip (16) is designed to at least partially form at least one spring rail recess (20) for receiving the at least one spring rail (18). At least one absorption unit (24) is proposed, which is arranged on the head strip (16) formed by the wiper lip (12) and which is designed to at least dampen at least one vibration, in particular between the spoiler (22) and the wiper lip (12).

Description

State of the art

[0001] A wiper blade device for a wiper, in particular a windscreen wiper, with at least one wiper lip which is designed to be moved over a window, in particular a vehicle window, and which forms at least one head strip, with at least one spoiler which is designed to deflect an air flow, with at least one spring rail which is designed to stiffen the wiper lip and which is designed to fix the spoiler to the wiper lip, wherein the head strip is designed to at least partially form at least one spring rail recess for receiving the at least one spring rail, has already been proposed. Disclosure of the invention

[0002] The invention is based on a wiper blade device for a wiper, in particular a windscreen wiper, with at least one wiper lip which is designed to be moved over a window, in particular a vehicle window, and which forms at least one head strip, with at least one spoiler which is designed to deflect an air flow, with at least one spring rail which is designed to stiffen the wiper lip and which is designed to fix the spoiler to the wiper lip, wherein the head strip is designed to at least partially form at least one spring rail recess for receiving the at least one spring rail.

[0003] At least one absorption unit is proposed, which is arranged on the head strip formed by the wiper lip and which is designed to at least dampen one vibration, in particular between the spoiler and the wiper lip.

[0004] The inventive design of the wiper blade device advantageously makes it possible to provide a high level of operating comfort, since in particular the vibration is dampened and low noise emissions can be ensured. Advantageously, high cleaning performance can be provided, since in particular the vibration dampening ensures streak-free and / or residue-free cleaning of the windshield. Advantageously, high safety can be provided, since in particular the vibration dampening enables particularly high cleaning performance. Advantageously, high reliability / maintenance intervals can be provided, since in particular the mechanical stress on the wiper blade device is low due to the vibration dampening.

[0005] The wiper blade device is preferably designed for use on a vehicle, in particular a car and / or truck. Alternatively, the vehicle could also be designed as a ship and / or an aircraft or a locomotive or as a comparable vehicle and / or means of transport. The wiper is preferably designed as a windshield wiper and / or a sensor wiper and / or a comparable wiper. The wiper blade device preferably forms at least part of the wiper, in particular a windshield wiper. The wiper blade device is preferably designed to clean a surface, preferably the windshield, for example the vehicle windshield and / or a sensor field surface of a sensor and / or a headlight lens and / or the like, in particular of the vehicle.Preferably, the wiper blade device is coupled to the vehicle, preferably to at least one wiper drive of the vehicle, for cleaning the window, preferably the vehicle window, such as a windshield and / or rear window and / or the sensor field surface. Preferably, the wiper drive is configured to move the wiper blade device over the window, in particular the vehicle window and / or the sensor field surface. Preferably, the wiper lip is configured to be moved over the vehicle window and / or the sensor field surface during a cleaning process, in particular if this is integrated into the vehicle window. Preferably, the wiper lip contacts the vehicle window and / or the sensor field surface in at least one operating state. Preferably, the wiper lip is made of rubber, in particular elastomer. In particular, the wiper blade device is coupled to a wiper arm of the wiper.The wiper blade device preferably has a wiper blade adapter which is configured at least for a mechanical coupling of the wiper blade device to the wiper arm, in particular a wiper arm adapter of the wiper arm. The wiper blade device preferably has at least one spoiler which is configured to generate a contact pressure of the wiper lip against the windshield. The spoiler preferably has a curved shape which is configured to deflect an air flow away from the windshield. In particular, the air flow is designed as a wind and / or airstream. The spoiler is preferably connected to the wiper lip in a form-fitting manner, in particular via the at least one spring rail. “Configured” or “provided” should be understood in particular to mean specially designed and / or equipped.The fact that an object is set up or intended for a specific function should be understood in particular to mean that the object fulfils and / or executes this specific function in at least one application and / or operating state.

[0006] The wiper lip preferably has a base body. The wiper lip preferably has a head strip. The head strip is preferably connected to the base body via a head web of the wiper lip. The wiper lip preferably has a wiper strip. The wiper strip is preferably connected to the base body via a tilting web of the wiper lip. The wiper strip is preferably designed to contact the window in at least one operating state. The head strip and / or the head web and / or the base body and / or the tilting web and / or the wiper strip are preferably formed in one piece, in particular monolithically. The wiper lip preferably forms the base body, the head strip, the head web, the tilting web and / or the wiper strip. The wiper lip preferably has at least one spring rail recess. The at least one spring rail recess is preferably designed to partially accommodate a spring rail.

[0007] The spring rail recess is preferably delimited by the base body and / or the head strip and / or the head web. The at least one spring rail is preferably connected to the wiper lip and / or the spoiler in a form-fitting manner. The wiper lip preferably contacts exclusively the at least one spring rail and the absorption unit. The wiper lip is preferably arranged without contact with the spoiler. The term “integral” should be understood in particular to mean at least materially connected, for example by a welding process, an adhesive process, an injection molding process and / or another process that appears appropriate to a person skilled in the art, and / or advantageously formed in one piece, for example by production from a single casting and / or by production using a single or multi-component injection molding process and advantageously from a single blank.

[0008] The spoiler preferably has at least one corresponding spring rail recess in which the at least one spring rail is partially arranged. Preferably, the at least one spring rail is designed to stiffen the wiper blade device. Preferably, the at least one spring rail is designed to fasten the spoiler, in particular in a form-fitting manner, to the wiper lip. Preferably, the at least one spring rail is designed to fasten the wiper blade adapter, in particular in a form-fitting manner, to the wiper lip. Preferably, the spring rail is designed as a composite component which has at least one metallic stiffening element and a damping element, in particular a viscoelastic one. Preferably, the at least one spring rail is structurally identical to the absorption unit. Alternatively, the spring rails could be designed as a one-piece metallic spring element.The spoiler preferably encompasses the at least one spring rail. The spoiler preferably forms a receiving area that is configured to receive at least the head strip and the absorption unit. The head strip, the head web, the absorption unit, and the at least one spring rail are preferably arranged entirely within the receiving area. The base body is preferably arranged partially within the receiving area. Depending on the design of the wiper lip, additional functional areas, such as the tilting web, of the wiper lip can be arranged within the receiving area.

[0009] The absorption unit preferably contacts the header strip and the spoiler in at least one operating state. The absorption unit is preferably pressed between the header strip and the spoiler. It is conceivable that the absorption unit only contacts the header strip in at least one operating state and is arranged without contact with the spoiler. The absorption unit is preferably designed as a solid-state component. Alternatively, the absorption unit could have at least one fluidic absorption element or be designed as the fluidic absorption element. It is conceivable that the absorption unit is formed by the header strip. For example, the header strip could contact the spoiler. The absorption unit is preferably designed to at least partially absorb vibration.Preferably, a spring and / or damping effect of the absorption unit is arranged parallel to a spring and / or damping direction of the at least one spring rail. A "vibration" is understood in particular to mean an oscillation of a component. An "oscillation" is understood in particular to mean a periodic change in one or more physical variables, such as a component speed and / or component position, or the like.

[0010] It is further proposed that a main extension plane of the absorption unit is arranged at least substantially parallel to the window, in particular the vehicle window, and / or a main extension plane of the at least one spring rail. Advantageously, a high damping performance can be provided since, in particular, the vibrations perpendicular to the vehicle window are particularly well damped. Advantageously, a high level of operating comfort can be provided since, in particular, the vibrations perpendicular to the vehicle window, which lead to noise and / or functional impairment, are damped. Preferably, the absorption unit has a main damping direction which is arranged at least substantially perpendicular to the window, in particular the vehicle window, and / or the main extension plane of the at least one spring rail. Preferably, the absorption unit extends at least substantially over a longitudinal extent of the wiper lip.Alternatively, several absorption units could be arranged on the head strip in sections along the longitudinal extension of the wiper lip, in particular spaced apart from one another. In this context, "at least substantially" is to be understood in particular as meaning that a deviation from a predetermined value deviates by, in particular, less than 25%, preferably less than 10%, and particularly preferably less than 5% of the predetermined value. A "main extension plane" of a structural unit is to be understood in particular as a plane that is parallel to a largest side surface of a smallest imaginary cuboid that just completely encloses the structural unit, and in particular runs through the center of the cuboid.

[0011] Furthermore, it is proposed that the absorption unit be integrally connected, in particular by a material bond, at least to the head strip of the wiper lip and / or the spoiler. Advantageously, a high level of operational reliability can be provided, since, in particular, the material bond is designed to be non-detachable. Preferably, the absorption unit is glued to the head strip and / or the spoiler or vulcanized to the head strip and / or the spoiler. The absorption unit preferably has a thickness of at least 1 mm. "Material bonded" is to be understood in particular as meaning that the mass parts are held together by atomic or molecular forces, such as during soldering, welding, gluing, and / or vulcanization.

[0012] Furthermore, it is proposed that the absorption unit has at least one, preferably two, stiffening elements. This can provide advantageous properties with regard to construction, since the absorption unit in particular has a high level of stiffness. Preferably, the two stiffening elements are arranged at least substantially parallel to one another. Preferably, the two stiffening elements are arranged one above the other. Preferably, the two stiffening elements are arranged without contact with one another. Preferably, the two stiffening elements are arranged at least substantially congruent with one another when viewed perpendicular to the main extension plane of the stiffening elements. Preferably, the at least two stiffening elements are of identical construction. Preferably, the at least two stiffening elements are made of the same material.

[0013] It is also proposed that the at least one stiffening element be made of a metallic material or a plastic material, in particular a thermoplastic. This can provide advantageous properties with regard to manufacturing, since in particular the metallic material or the plastic material can be manufactured easily. Advantageously, a construction can be provided at low cost, since in particular a stiffening element made of a metal or a plastic can be manufactured and / or purchased inexpensively. Preferably, the stiffening element is designed to stiffen the absorption unit. Preferably, the stiffening element is designed to be deformed at most elastically, at least during normal operation. Preferably, the at least two stiffening elements are made of the same material.Preferably, the at least two stiffening elements are formed from a metallic material. Alternatively, it is conceivable for at least one of the at least two stiffening elements to be formed from a metallic material and at least one of the at least two stiffening elements to be formed from a plastic material. The stiffening element is preferably dimensionally stable. A "dimensionally stable stiffening element" is understood to mean, in particular, a component that exhibits elastic deformation under mechanical stress and returns to its original shape when the mechanical stress is removed.

[0014] It is further proposed that the absorption unit comprise at least one damping element. This can advantageously provide a high level of operating comfort, since in particular the vibration is dampened and low noise emissions can be ensured. It is advantageously possible to provide a high level of cleaning performance, since in particular the damping of the vibration results in streak-free and / or residue-free cleaning of the window. Preferably, the damping element is configured to at least partially absorb vibration energy. Preferably, the damping element has a thickness that is less than the thickness of the at least one stiffening element. It is conceivable for the damping element to be designed as a viscous damping element.In this case, “damping” should be understood as at least a reduction of the amplitude of the vibration by at least partially absorbing the vibration energy.

[0015] It is additionally proposed that the at least one damping element be arranged between the two stiffening elements. This can provide advantageous properties with regard to construction, since in particular the absorption unit has high rigidity and, at the same time, good damping properties. Preferably, the damping element is arranged between the two stiffening elements in layered form, in particular in a sandwich form. Preferably, the at least one stiffening element and the damping element are arranged in series. Preferably, the damping element is integrally connected to the at least one, preferably the two, stiffening element(s), for example, glued or vulcanized. It is conceivable for the absorption unit to have a plurality of stiffening and damping elements which are arranged alternately in layers.

[0016] It is further proposed that the at least one damping element be formed from a viscoelastic material. Advantageous damping properties can be achieved, particularly since the viscoelastic material properties at least partially absorb the vibration energy. A "viscoelastic material" is understood to mean, in particular, a material that, in at least one state, exhibits both at least partially elastic material behavior and at least partially viscous material behavior.

[0017] In addition, it is proposed that the damping element be made of an elastomer, for example EPDM. This can provide advantageous properties with regard to construction, since the elastomer in particular has particularly good material properties. Preferably, a damping constant of the damping element depends on a material and / or a geometry of the damping element. Preferably, the damping element has a damping constant that is different from that of the spring rails in order to provide a broader damping spectrum of the wiper device. It is conceivable that the damping element is optimized for an oscillation frequency of the vibration. An “EPDM” should be understood in particular to mean an ethylene propylene diene rubber. A “damping constant” should be understood in particular to mean a damping function of the damping element, depending on a frequency range of the vibration.

[0018] Furthermore, a wiper, in particular a windshield wiper, with the wiper blade device is proposed. Advantageously, a high level of operating comfort can be provided, since in particular the vibration is dampened and low noise emissions can be ensured by the wiper blade device. Advantageously, a high level of cleaning performance can be provided, since in particular the dampening of the vibration results in streak-free and / or residue-free cleaning of the windshield. Advantageously, a high level of safety can be provided, since in particular the dampening of the vibration makes it possible to achieve a particularly high level of cleaning performance. Preferably, the wiper has the wiper arm and the wiper arm adapter. Preferably, the wiper arm adapter is connected to the wiper blade adapter. Alternatively, the wiper arm adapter could be connected directly to the wiper blade.

[0019] The wiper blade device according to the invention and the wiper according to the invention are not intended to be limited to the application and embodiment described above. In particular, the wiper blade device according to the invention and the wiper according to the invention may have a number of individual elements, components, units, and method steps that differs from the number stated herein to fulfill a function described herein. Furthermore, in the value ranges specified in this disclosure, values ​​within the stated limits are also to be considered disclosed and can be used arbitrarily. drawing

[0020] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0021] They show: Fig. 1 a wiper blade device and a wiper arm in a schematic side view and Fig. 2 the wiper blade device in a schematic sectional view. Description of the embodiment

[0022] The Fig. 1 shows a wiper 10. The wiper 10 is designed as a windshield wiper. The wiper 10 is configured to clean a window 14. The window 14 is part of a motor vehicle. The window 14 is designed as a vehicle window. The wiper 10 has a wiper arm 34. The wiper arm 34 has a wiper arm adapter 32. The wiper 10 has a wiper blade device. The wiper blade device has a wiper blade adapter 30. The wiper blade device is attached to the wiper arm 34. For this purpose, the wiper blade adapter 32 is mechanically coupled to the wiper arm adapter 32. The wiper blade device can be universally coupled to various wiper arms 10 via the wiper blade adapter 30. The wiper blade device has a wiper lip 12. The wiper lip 12 contacts the window 14 during a wiping operation of the wiper 10. The wiper lip 12 is designed to be moved over the window 14 during the wiping operation.The wiper device has a longitudinal direction 36. The longitudinal direction 36 is arranged parallel to a main direction of extension of the wiper lip 12. The vehicle has a drive unit (not shown). The drive unit is configured to drive the wiper arm 34.

[0023] The Fig. 2 shows a schematic sectional view of the wiper blade device along section II-II. The wiper blade device has a spoiler 22. The spoiler 22 is configured to deflect an air flow. The spoiler 22 is configured to generate a contact pressure of the wiper lip 12 against the windshield 14. The contact pressure depends on a speed of the vehicle. The wiper lip 12 has a line of symmetry 48. The wiper lip 12 is designed symmetrically to the line of symmetry 48. The wiper blade device has a spring rail 18. The spring rail 18 is configured to stiffen the wiper lip 12. The spring rail 18 is configured to fix the spoiler 22 to the wiper lip 12. The spring rail 18 is configured to fix the wiper blade adapter 30 to the wiper lip 12. The spring rail 18 has two stiffening elements 26'.The stiffening elements 26' are made of a metallic material, for example steel. The spring rail 18 has a damping element 28'. The damping element 28' is made of a viscoelastic material. The damping element 28' is made of an elastomer. The damping element 28' is arranged between the two stiffening elements 26'. The wiper blade device has a further spring rail 18'. The further spring rail 18' is designed to stiffen the wiper lip 12. The further spring rail 18' is designed to fix the spoiler 22 to the wiper lip 12. The further spring rail 18' is designed to fix the wiper blade adapter 30 to the wiper lip 12. The further spring rail 18' is arranged on a side of the spring rail 18 opposite the wiper lip 12. The further spring rail 18' is constructed identically to the spring rail 18.

[0024] The wiper lip 12 has a wiper strip 44. The wiper strip 44 is configured to contact the window 14 in at least one operating state. The wiper lip 12 has a base body 38. The wiper lip 12 has a tilting web 40. The wiper strip 44 is connected to the base body 38 via the tilting web 40. The wiper lip 12 has a head strip 16. The wiper lip 12 forms the head strip 16. The head strip 16 is arranged on a side of the wiper strip 44 opposite the base body 38. The wiper lip 12 has a head web 42. The head strip 16 is connected to the base body 38 via the head web 42. The wiper lip 12 is configured as a monolithic component.

[0025] The wiper lip 12 forms a spring rail recess 20. The spring rail recess 20 is partially delimited by the head strip 16. The spring rail recess 20 is partially delimited by the base body 28.

[0026] The spring rail recess 20 is partially delimited by the head web 42. The spring rail 18 is partially arranged in the spring rail recess 20. The spoiler 22 forms a corresponding spring rail recess 46. The spring rail 18 is partially arranged in the corresponding spring rail recess 46. The spring rail 18 is partially arranged neither in the spring rail recess 18 nor in the corresponding spring rail recess 46. The wiper lip 12 is arranged without contact with the spoiler 22. The wiper lip 12 forms a further spring rail recess 20'. The spring rail 18' is partially arranged in the further spring rail recess 20'. The spoiler 22 forms a further corresponding spring rail recess 46'. The spring rail 18' is partially arranged in the further corresponding spring rail recess 46'.The spring rail 18' is partially arranged neither in the further spring rail recess 18' nor in the further corresponding spring rail recess 46'. The spring rail 18', the spring rail recess 20' and the corresponding spring rail recess 46' are arranged on the symmetry line 48, mirroring the spring rail 18, the spring rail recess 20 and the corresponding spring rail recess 46. The spoiler 22 is positively connected to the wiper lip 12 via the spring rail 18 and the further spring rail 18'. The spoiler 22 is positively connected to the spring rail 18 and the further spring rail 18'. The spoiler 22 engages behind the spring rail 18 and the further spring rail 18'.

[0027] The wiper blade device has an absorption unit 24. The absorption unit 24 is arranged on the head strip 16. The absorption unit 24 is arranged centrally to the head strip 16. A line of symmetry running perpendicular to a main extension plane of the absorption unit 24 is arranged at least substantially parallel to the line of symmetry 48. The line of symmetry of the absorption unit 24 and the line of symmetry 48 are arranged congruent with one another. The absorption unit 24 contacts the spoiler 22. The absorption unit 24 is configured to dampen a vibration between the spoiler 22 and the wiper lip 12. The vibration is formed as an oscillation between the spoiler 22 and the wiper lip 12. The absorption unit 24 has a main extension plane. The main extension plane of the absorption unit 24 is arranged parallel to the windshield 14.The absorption unit 24 extends over the longitudinal extension direction 36 of the wiper lip 12. The main extension plane of the absorption unit 24 is arranged parallel to the main extension plane of the spring rails 18, 18'. The absorption unit 24 has two stiffening elements 26. The stiffening elements 26 are made of a metallic material, for example steel. Alternatively, it is conceivable that one of the stiffening elements 26 or the two stiffening elements 26 is / are made of a plastic material. The plastic could be a thermoplastic material. The absorption unit 24 has a damping element 28. The damping element 28 is arranged between the two stiffening elements 26. The damping element 28 is made of a viscoelastic material. The damping element 28 is made of an elastomer. The elastomer is made of EPDM.The damping element 28 is configured to at least partially absorb vibration energy. The absorption unit 24 is pressed between the head strip 16 and the spoiler 22. The absorption unit 24 is integrally connected to the head strip 16 of the wiper lip 12. The absorption unit 24 is integrally connected to the head strip 16 of the wiper lip 12. The absorption unit 24 could be glued to the head strip 16 or vulcanized to the head strip 16. Alternatively, the absorption unit 24 could also be formed by the head strip 16. The absorption unit 24 has a damping constant that differs from that of the spring rails 18, 18'. The different damping constant is configured to enable a broader damping spectrum. The damping constant is determined by a geometry of the absorption unit 24 and / or the material used for the damping element.However, the absorption unit 24 could be constructed identically to the spring rails 18, 18'. However, the length and / or width and / or height dimensions of the absorption unit 24 may differ from the dimensions of the spring rails 18, 18'.

[0028] The spoiler 22 forms a receiving area 50. The receiving area 50 is configured to partially receive the wiper lip 12. The receiving area 50 is configured to completely receive the absorption unit 24. The receiving area 50 is configured to completely receive the head strip 16. The receiving area 50 could be configured to at least partially receive the head web 42 and / or the base body 38. The receiving area 50 is larger than the absorption unit 24 to allow space for deformation of the incompressible elastomer of the damping element 28 and / or the wiper lip 12.

[0029] The wiper device has two ends 52. The two ends 52 form two furthest points of the wiper lip 12. An end cap 54 is arranged at each end 52, see. Fig. 1. The end caps 54 are designed to fix the spring rails 18, 18' and the wiper lip 12 together in a form-fitting manner.

Claims

[1] Wiper blade device for a wiper (10), in particular a windscreen wiper, with at least one wiper lip (12) which is designed to be moved over a window (14), in particular a vehicle window, and which forms at least one head strip (16), with at least one spoiler (22) which is designed to deflect an air flow, with at least one spring rail (18) which is designed to stiffen the wiper lip (12) and which is designed to fix the spoiler (22) to the wiper lip (12), wherein the head strip (16) is designed to at least partially form at least one spring rail recess (20) for receiving the at least one spring rail (18), characterized byat least one absorption unit (24) which is arranged on the head strip (16) formed by the wiper lip (12) and which is designed to at least dampen at least one vibration, in particular between the spoiler (22) and the wiper lip (12). [2] Wiper blade device according to claim 1, characterized by that a main extension plane of the absorption unit (24) is arranged at least substantially parallel to the pane (14), in particular the vehicle pane, and / or a main extension plane of the at least one spring rail (18). [3] Wiper blade device according to one of the preceding claims, characterized by that the absorption unit (24) is connected in one piece, in particular by a material fit, at least to the head strip (16) of the wiper lip (12). [4] Wiper blade device according to one of the preceding claims, characterized bythat the absorption unit (24) has at least one, preferably two, stiffening elements (26). [5] Wiper blade device according to one of the preceding claims, characterized by that the at least one stiffening element (26) is formed from a metallic material or a, in particular thermoplastic, plastic material. [6] Wiper blade device according to one of the preceding claims, characterized by that the absorption unit (24) has at least one damping element (28). [7] Wiper blade device according to one of the preceding claims, characterized by that the at least one damping element (28) is arranged between the two stiffening elements (26). [8] Wiper blade device according to one of the preceding claims, characterized by that the at least one damping element (28) is made of a viscoelastic material. [9] Wiper blade device according to one of the preceding claims, characterized by that the damping element (28) is made of an elastomer, for example EPDM. [10] Wiper (10), in particular windscreen wiper, with the wiper blade device according to one of the preceding claims.

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