Source: https://patents.google.com/patent/EP1716026A1/en
Timestamp: 2020-01-28 20:21:57
Document Index: 227946510

Matched Legal Cases: ['art 16', 'art 16', 'art 16', 'art 16', 'art 16', 'art 16', 'arts 25', 'art 29', 'arts 25', 'arts 25', 'art 29']

EP1716026A1 - Windscreen wiper device - Google Patents
EP1716026A1
EP1716026A1 EP20040804834 EP04804834A EP1716026A1 EP 1716026 A1 EP1716026 A1 EP 1716026A1 EP 20040804834 EP20040804834 EP 20040804834 EP 04804834 A EP04804834 A EP 04804834A EP 1716026 A1 EP1716026 A1 EP 1716026A1
EP1716026B1 (en
The invention relates to a windshield wiper device, especially for a motor vehicle, with at least one wiper arm, which is locked with at least one locking element on a shaft.
Pedestrians are completely unprotected when colliding with vehicles. Especially the relentless, hard parts beneath the hood often result in serious injury upon impact with a pedestrian on a vehicle. The windshield wiper device is located in a region often impinge in the pedestrians upon impact with a vehicle. The generally known from the prior art windscreen wiper devices have the disadvantage that they represent a great risk of injury to pedestrians upon impact to the vehicle.
The invention is to improve a windscreen wiper device of the type mentioned at the outset that in the future the risk of injury to a pedestrian is reduced to a vehicle upon impact the object.
The invention achieves the object by a windshield wiper device of the type mentioned, in which according to the invention the at least one locking element is destroyed in a collision on the at least one wiper arm. This allows the at least one wiper arm at impact downstream ben so that the risk of injury to the pedestrian is reduced.
The at least one wiper arm may comprise a plug-in via the shaft sleeve. The length of the sleeve corresponds approximately to a displacement of the wiper arm at impact. Upon impact, the shaft is pushed in accordance with the possible displacement in the sleeve. The longer the sleeve is, the greater the displacement. The length of the sleeve can be adjusted depending on the space available individually on the respective type of vehicle. Therefore, the shaft and a wiper motor for all vehicle types may be standardized components, thereby saving costs.
Thus, a torque can be reliably transmitted from the shaft to the wiper arm, the shaft with the at least one wiper arm can be positively and / or positively connected.
In a further development of the invention a shaped part can be disposed between the shaft and the sleeve. The molding produces a form-fit between the sleeve and the shaft. When the molded part is a ring which has on its outer circumferential sharp teeth may dig on the shaft, the teeth in the sleeve during assembly of the wiper arms. The installation team can initially align the wiper arm when it is mounted in its optimal parking position, and press on it then click the sharp teeth of the ring, causing the wiper arm is fixed in its optimum position. In a particular embodiment, the molded part can also be formed integrally with the shaft. Then, the shaft may have, for example, knurling in a certain range. The diameter of the shaft may have a shoulder on which an inner edge of the sleeve can be supported. In this way, the shoulder and the inner edge in the direction of the impact force form e- benfalls a sleeve on the shaft locking form closure. The inner edge of the sleeve forms a predetermined breaking point. Upon impact a person on the wiper arm, the inner edge of the sleeve shears off so that the sleeve can slide in the direction of impact over the shaft.
In order to secure a wiper arm in both axial directions of the shaft to a minimum the at least one wiper arm can be connected frictionally to the shaft by a screw.
For this reason, the shaft has advantageously a threaded bore, or an outer threaded portion.
When a screw head or a nut bears against the molded part, the molded part when tightening a screw or the nut can be easily pressed into the wiper arm.
In another preferred embodiment, a pin may be inserted through the sleeve and / or the shaft. The pin locks the sleeve on the shaft. Upon impact of a person on the wiper arm, the pin shears off, so that the sleeve can slide over the shaft. In order to promote the shearing of the pin, the pin may have a predetermined breaking point in its most stressed during the impact area. It is also possible that a spring element at least partially surrounds the shaft, "the spring element locking the sleeve to the shaft in the axial direction. Upon impact a person on the wiper arm, the spring element is destroyed. To facilitate the destruction upon impact, the spring element may have a predetermined breaking point.
Depending on the pin and / or the spring element is made of plastic or metal may be generated by the pressure acting on impact forces and the dimensions of the pin and / or the spring element.
In the sleeve a vent may be provided. Thereby, on the shaft during assembly and during the impact of a person escaping to the wiper arm in the sleeve the air present during pressing of the wiper arm.
Various embodiments of the windshield wiper device according to the invention are explained in detail with reference to the accompanying drawings.
1 is a sectional view through a first embodiment of the windshield wiper device.
Fig. 2a shows a section through a first embodiment of the molding;
FIG. 2b shows a section through a second embodiment the molding; Fig. 2c shows a section through a third exemplary form of the molded part;
Figure 2d shows a section through a fourth embodiment of the molding.
Fig. 2e, a section through a fifth embodiment of the molding;
3 is a sectional view through a further embodiment of the windshield wiper device.
4 shows a section through the shaft having a first Verstiftungsmöglichkeit.
Figure 5a shows a section through the shaft at a second Verstiftungsmöglichkeit.
FIG. 5b is a longitudinal section through the shaft from Fig. 5a;
Fig. 6 is a section through the shaft and a first embodiment of the spring element;
Fig. 7a is a sectional view of the shaft and a second embodiment of the spring element;
Fig. 7b shows a longitudinal section through the shaft from Fig. 7a.
Fig. 1 shows a wiper device 10 in which a sleeve 11 of a wiper arm is inserted through a shaft 13 12. The sleeve 11 is provided with an inner edge 14, which rests on a shoulder 15 of the shaft 13, and thus locks the sleeve on the shaft from above to below. When a force acts from above on an impact of a person on the wiper arm 12 to the wiper arm 12, the inner edge 14 shears from the sleeve. 11 Consequently, the sleeve 11 and the wiper arm 12 are displaced downward so that the wiper arm 12 gives way, and the risk of injury to the impacting on the wiper arm 12 person is reduced. Between the shaft 13 and the sleeve 11 is a molded part 16 (see FIGS. 2a-2e) is arranged. The molding 16 has a sharp-edged teeth on its outer circumference. When Verschraiαben a nut 17 having an externally threaded portion 18, the sharp teeth of the mold part 16 is pressed into the sleeve. 11 therefore, the sleeve 11 has in the region of the mold part 16 to a region 19 having a smaller inner diameter. In addition, the mold part 16 is adapted to the outer contour of the shaft 13 inside contour. Thereby is also made a positive connection between the molding 16 and the shaft. 13 By the positive connection between the shaft 13 and the mold part 16 and mold part 16 and the sleeve 11, a torque can be reliably transmitted from the shaft 13 to the wiper arm 12th 12 further comprises the wiper arm to a closed with a cap 100 opening. Through them, the wiper arm can be bolted 12 to the shaft. 13
Figs. 2a to 2e show various embodiments of shafts 20, 21, 22, 23 and 24 and show various embodiments of mold parts 25, 26, 27, 28 and 29. As shown, the shaft 20 has a polygonal cross-section or the shaft 23 has a quadrangular , in particular square cross-section. It is also possible that the shaft 21 has longitudinally extending grooves 200th The shaft 22 is formed as a splined shaft. The shaft 24 is provided at its outer periphery with sharp teeth 201, which press during insertion of the molded part 29 on the shaft 24 in the molding 29th The mold parts 25, 26, 27 and 28 are provided at their outer periphery with sharp teeth 202, 203, 204 and 205th The teeth 202, 203, 204 and 205 are expressed in the assembly of the mold parts 25, 26, 27 and 28 in the shaft a. The molded part 29 is formed, however, polygonal on its outer circumference. Through the sharp-edged teeth 201, 202, 203, 204 and 205 of the wiper arm 12 can be mounted in its optimum parking position on the shaft. 13 For this purpose, the wiper arm 12 is first aligned in its optimal parking position. Subsequently, the sleeve 11 or the molding 29 on the sharp-edged teeth 201, 202, 203, 204 and 205 pressed. The pressing on the teeth 201, 202, 203, 204 and 205 can be done by tightening the nut 17 with ease.
In Fig. 3 a windshield wiper device 30 is illustrated in which a sleeve 31 of a wiper arm is mounted on a shaft 33 32. The sleeve 31 is connected by means of a knurling 34 positively connected to the shaft 33 so that torque from the shaft 33 to the wiper arm 32 can be reliably transmitted. Through the sleeve 31 and the shaft 33 a pin 35 is inserted (see also Fig. 4), which locks the sleeve 31 to the shaft 33. Upon impact of a person on the wiper arm 32, the pin 35 shears off between the sleeve 31 and the shaft 33rd Consequently, the sleeve 31 is pushed on impact Ü down via the shaft 33rd In addition, 31 36, the sleeve has a Entlüftungsö fnung on. Through it can escape to the shaft 33 during assembly and during the impact of the person on the wiper arm 32 is a sleeve 31 in the presence of air during pressing of the wiper arm 32nd
In FIGS. 5a and 5b, a second Verstiftungsmöglichkeit is shown, in which a shaft 50 has a circumferential groove 51 engaged by two pins 52nd Upon impact a person on a not shown wiper arm pins 52 are destroyed.
Fig. 6 shows a spring element 60, which is snapped onto a shaft 61, and thus surrounds this. The shaft 61 has recesses 62, into which the spring element is engageable 60th The shaft 61 includes a not shown here circumferential groove into which the spring element 60 may also engage. Consequently, the spring element 60 is locked a bush 64 in the axial direction on the shaft 61. The spring element 60 has, as a predetermined breaking points serving weakened areas 63. Upon impact of the person on the wiper arm, the spring element 60 breaks in the areas 63, whereby the sleeve can be displaced in the direction of impact 64th
Figs. 7a and 7b show a spring element 70 which is snapped on to a not shown here, a shaft groove 71st Upon impact of the person on a wiper arm, not shown here, the spring element 70 can dig into sharp teeth 72 of the shaft 71st In this embodiment, it is expedient to manufacture the spring element consists of plastic, so that the teeth 72 can dig into the spring element 70 upon impact easily.
1. Windscreen wiper device (10, 30), in particular for a motor vehicle, with at least one wiper arm (12, 32) with at least one locking element on a shaft (13, 33, 61, 71) is locked, characterized in that the at least a locking element is destroyed in a collision on the at least one wiper arm (12, 32).
2. Windscreen wiper device (10, 30) according to claim 1, characterized in that the at least one wiper arm (12, 32) comprises a through shaft (13, 33, 61, 71) plug sleeve (11, 31, 64).
3. Windscreen wiper device (10, 30) according to claim 1 or 2, characterized in that the shaft (13, 33, 61, 71) with the at least one wiper arm (12, 32) positively and / or positively connected.
4. Windscreen wiper device (10, 30) according to claim 3, characterized in that between the shaft (13, 33, 61, 71) and the sleeve (11, 31, 64), a molding (16, 25, 26, 27, 28 , 29) is arranged.
5. Windscreen wiper device (10) according to claim 3 or 4, characterized in that the diameter of the shaft (13) has a shoulder (15) on which an inner edge (14) of the sleeve (11) is supportable.
6. windscreen wiper device (10) according to any one of claims 3 to 5, characterized in that the at least one wiper arm (12) is screwed to the shaft (13).
7. Windscreen wiper device (10) according to claim 6, characterized in that the shaft (13) has a threaded bore, or an externally threaded portion (18).
8. windscreen wiper device (10) according to one of claims 4 to 7, characterized in that a screw head or a nut (17) on the molding (16).
9. Windshield wiper device (30) according to claim 3 or 4, characterized in that through the sleeve (31) and / or the shaft (33) a pin (35, 52) is inserted.
10. Windshield wiper device (30) according to claim 3 or 4, characterized in that a spring element (60, 70) the shaft (33, 61, 71) at least partially surrounds, wherein the spring element (60, 70), the sleeve (31, 64 ) on the shaft (33, 61, locked 71) in the axial direction.
11. Windshield wiper device (30) according to claim 9 or 10, characterized in that the pin (35, 52) and / or the spring element (60, 70) is made of plastic or metal.
12. Windshield wiper device (30) according to any one of claims 2 to 11, characterized in that in the sleeve (31, 64) has a vent (36) is provided.
EP1716026A1 true EP1716026A1 (en) 2006-11-02
EP1716026B1 EP1716026B1 (en) 2009-05-13
DE19938969A1 (en) 1999-08-17 2001-02-22 Bosch Gmbh Robert Device for fixing a wiper arm on a drive shaft
US6568023B2 (en) * 2000-12-14 2003-05-27 Ford Global Technologies, L.L.C. Wiper pivot
FR2840270B1 (en) 2002-05-28 2004-12-10 Valeo Systemes Dessuyage Safety arrangement for separating the wiping arm from the drive shaft in case of impact
See references of WO2005080155A1 *
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