Pretensioning device for a windscreen wiping device

Patent metadata

Field	Value
Publication number	US-10322698-B2
Application number	US-201515328560-A
Country	US
Kind code	B2
Filing date	Jul 10, 2015
Priority date	Jul 24, 2014
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

The present invention relates to a windscreen wiping device (100) for a vehicle, comprising a wiper blade (2) with an elongate upper part (10) and an elongate lower part (12), which are configured to be at least partially bendable. Furthermore, a plurality of connecting elements (18) for connecting the upper part (10) and the lower part (12) are provided, said connecting elements being spaced apart from one another along a longitudinal extent (8) of the windscreen wiping device and being designed to permit a movement of the upper part (10) and of the lower part relative to each other with a movement component along a longitudinal extent (8) of the windscreen wiping device. Furthermore, the windscreen wiping device has a pretensioning device (50), wherein the pretensioning device has a force-absorbing element (32) which is connected to a force transmission element (33) such that, in the event of a dynamic effect on the force-absorbing element (32) in the direction of the elongate lower part (12), a rotational movement of the force transmission element (33) is brought about, thus resulting in a movement of the elongate upper part (10) relative to the elongate lower part with a movement component along a longitudinal extent (8) of the windscreen wiping device.

First claim

What is claimed is:

1. A windshield wiper device for a vehicle, comprising a wiper blade ( 2 ) with
an elongate upper part ( 10 ), which is configured to be at least partially bendable,
an elongate lower part ( 12 ), which is configured to be at least partially bendable, and
a plurality of connecting elements ( 18 ) connecting the upper part ( 10 ) and the lower part ( 12 ), wherein the connecting elements ( 18 ) are spaced apart from one another along a longitudinal extent ( 8 ) of the windshield wiper device, and wherein the connecting elements ( 18 ) are configured in order to permit a movement of the upper part ( 10 ) and of the lower part relative to each other with a movement component along the longitudinal extent ( 8 ) of the windshield wiper device, wherein the connecting elements ( 18 ) substantially have a thickness of greater than or equal to 0.4 millimeter, and
a pretensioning device ( 50 ), wherein the pretensioning device ( 50 ) comprises a force absorption element ( 32 ) which is connected to a force transmission element ( 33 ), and therefore, in the event of an action of force on the force absorption element ( 32 ) in the direction of the elongate lower part ( 12 ), a rotational movement of the force transmission element ( 33 ) is brought about, as a result of which a movement of the elongate upper part ( 10 ) relative to the elongate lower part ( 12 ) results, with a movement component along the longitudinal extent ( 8 ) of the windshield wiper device;
wherein the force transmission element ( 33 ) is connected at a first end via a first rotary joint ( 37 ) to the elongate upper part ( 10 ), and wherein the force transmission element ( 33 ) is connected at a second end via a second rotary joint ( 36 ) to the force absorption element ( 32 ).

2. The windshield wiper device as claimed in claim 1 , wherein the pretensioning device ( 50 ) comprises a stop ( 31 ), which is spaced apart from the lower part ( 12 ), in order to determine a ratio between a pretensioning force and a contact pressure force of the windshield wiper device ( 100 ).

3. The windshield wiper device as claimed in claim 2 , wherein the stop ( 31 ) is connected to the force absorption element ( 32 ), and wherein the stop ( 31 ) is configured in order, in the event of an action of force on the force absorption element ( 32 ), to limit a movement of the force absorption element ( 32 ) in the direction of the elongate lower part ( 12 ) to a maximum movement distance of 20 mm.

4. The windshield wiper device as claimed in claim 2 , wherein the stop ( 31 ) is configured in the shape of a pin and is arranged in order to form a stop with the elongate lower part ( 12 ) at the maximum movement distance of the force absorption element ( 32 ).

5. The windshield wiper device as claimed in claim 2 , wherein the stop ( 31 ) is configured in order to transmit a force of at least 10 N to the elongate lower part ( 12 ).

6. The windshield wiper device as claimed in claim 2 , wherein the stop ( 31 ) is connected to the force absorption element ( 32 ), and wherein the stop ( 31 ) is configured in order, in the event of an action of force on the force absorption element ( 32 ), to limit a movement of the force absorption element ( 32 ) in the direction of the elongate lower part ( 12 ) to a maximum movement distance of 15 mm.

7. The windshield wiper device as claimed in claim 2 , wherein the stop ( 31 ) is connected to the force absorption element ( 32 ), and wherein the stop ( 31 ) is configured in order, in the event of an action of force on the force absorption element ( 32 ), to limit a movement of the force absorption element ( 32 ) in the direction of the elongate lower part ( 12 ) to a maximum movement distance of 10 mm.

8. The windshield wiper device as claimed in claim 2 , wherein the stop ( 31 ) is configured in order to transmit a force of at least 15 N to the elongate lower part ( 12 ).

9. The windshield wiper device as claimed in claim 2 , wherein the stop ( 31 ) is configured in order to transmit a force of at least 20 N to the elongate lower part ( 12 ).

10. The windshield wiper device as claimed in claim 1 , wherein the force transmission element ( 33 ) is arranged in such a manner that, in an unloaded state of the windshield wiper device, an angle α between a longitudinal axis ( 35 ) of the force transmission element ( 33 ) and an axis ( 38 ) that is perpendicular to a direction of movement ( 50 ) of the force absorption element ( 33 ) is within an angular range of at least 15° to at maximum 60°.

11. The windshield wiper device as claimed in claim 1 , further comprising a guide ( 34 ) configured to guide a movement of the force absorption element ( 32 ) in the direction of the elongate lower part ( 12 ).

12. The windshield wiper device as claimed in claim 1 , further comprising a wiper arm ( 40 ) configured to exert a compressive force on the force absorption element.

13. The windshield wiper device as claimed in claim 1 , further comprising a tension generation device ( 41 ) configured to exert a tensile force on the force absorption element.

14. The windshield wiper device as claimed in claim 1 , wherein the force transmission element ( 33 ) is arranged in such a manner that, in an unloaded state of the windshield wiper device, an angle α between a longitudinal axis ( 35 ) of the force transmission element ( 33 ) and an axis ( 38 ) that is perpendicular to a direction of movement ( 50 ) of the force absorption element ( 33 ) is within an angular range of at least 20° to at maximum 45°.

15. The windshield wiper device as claimed in claim 1 , wherein the force transmission element ( 33 ) and the force absorption element ( 32 ) are each a linear linkage element.

16. A windshield wiper device for a vehicle, comprising a wiper blade ( 2 ) with
an elongate upper part ( 10 ), which is configured to be at least partially bendable,
an elongate lower part ( 12 ), which is configured to be at least partially bendable, and
a plurality of connecting elements ( 18 ) connecting the upper part ( 10 ) and the lower part ( 12 ), wherein the connecting elements ( 18 ) are spaced apart from one another along a longitudinal extent ( 8 ) of the windshield wiper device, and wherein the connecting elements ( 18 ) are configured in order to permit a movement of the upper part ( 10 ) and of the lower part relative to each other with a movement component along the longitudinal extent ( 8 ) of the windshield wiper device, wherein the connecting elements ( 18 ) substantially have a thickness of greater than or equal to 0.4 millimeter,
a pretensioning device ( 50 ), wherein the pretensioning device ( 50 ) comprises a force absorption element ( 32 ) which is connected to a force transmission element ( 33 ), and therefore, in the event of an action of force on the force absorption element ( 32 ) in the direction of the elongate lower part ( 12 ), a rotational movement of the force transmission element ( 33 ) is brought about, as a result of which a movement of the elongate upper part ( 10 ) relative to the elongate lower part ( 12 ) results, with a movement component along the longitudinal extent ( 8 ) of the windshield wiper device; and
a guide ( 34 ) configured to guide a movement of the force absorption element ( 32 ) in the direction of the elongate lower part ( 12 ).

17. The windshield wiper device as claimed in claim 16 , further comprising a tension generation device ( 41 ) configured to exert a tensile force on the force absorption element.

18. A windshield wiper device for a vehicle, comprising a wiper blade (

Assignees

• Bosch Gmbh Robert

Inventors

• Deak Peter
• Weiler Michael
• Geleta Attila
• Hackl Viktor

Classifications

• B60S2001/3813

  chacterised by a support harness consisting of several articulated elements · CPC title

• B60S2001/3812

  Means of supporting or holding the squeegee or blade rubber · CPC title

• B60S1/3801 Primary

  characterised by a blade support harness consisting of several articulated elements (B60S1/3803, B60S1/3806 take precedence) · CPC title

• B60S1/3411

  with means for varying wiper-blade pressure on windshield during operation · CPC title