Wiper pivot

Details Wiper pivot Wiper pivot

2001-02-05

2004-04-13

Warden, Sr., Robert J. (Department: 1744)

Brushing, scrubbing, and general cleaning

Attachments

Optical-member-attachable cleaner

C015S250300, C403S002000, C403SDIG003, C296S096150

Reexamination Certificate

active

06718592

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a wiper pivot for rotatably supporting a pivot shaft connected with a wiper arm in order to wipe the windshield of the motor vehicle by using the wiper motor.
2. Description of the Prior Art
As the wiper pivot for supporting rotatably the pivot shaft connected with the wiper arm, a wiper pivot to be used in the wiper linkage
50
shown in
FIG. 8
has been known. A pair of wiper pivots
51
and
52
are used in the wiper linkage
50
shown in
FIG. 8
, and the first and second wiper pivots
51
and
52
are secured at the both ends of a pipe frame
55
, respectively. The first and second wiper pivots
51
and
52
are respectively formed with a first and a second pivot holder
51
a
and
52
a
for rotatably supporting a first and a second pivot shaft
53
and
54
respectively and body-fixing portions
51
b
and
52
b
. The first and second wiper pivots
51
and
52
are fixed by screwing the respective body-fixing portions
51
b
and
52
b
on an inner panel disposed on the under side of a cowl top panel (not shown). The top ends of the first and second pivot shafts
53
and
54
are disposed protrudingly from the cowl top panel, and secured respectively with wiper arms fitted with wiper blades. The first and second pivot shafts
53
and
54
are connected to base ends of a first and a second pivot arm
56
and
57
which form a part of linkage
62
at the respective base ends thereof, and a first link connecting rod
58
which forms another part of the linkage
62
is connected between the respective free ends of the first and second pivot arms
56
and
57
. Furthermore, one end of a second link connecting rod
59
which forms another part of the linkage
62
is connected to a position near to the free ends of the first pivot arm
56
, and another end of the second link connecting rod
59
is connected to the free end of a motor arm
60
which forms the other part of the linkage
62
. The motor arm
60
is secured with an output shaft
61
a
of a wiper motor
61
at the base end thereof.
In the aforementioned conventional wiper pivot, there is a problem in that an object (body) receives a remarkable impact from the protruding pivot shafts
53
and
54
at the time of collision of the object against the pivot shafts
53
and
54
.
SUMMARY OF THE INVENTION
It is, therefore, a purpose of the present invention to provide a wiper pivot, which is possible to prevent the object (body) from the large impulsive force even if the pivot shaft collides with the object from the outside.
The above-mentioned purpose can be achieved by providing a wiper pivot according to this invention, which is characterized by comprising a pivot shaft provided with a base end connected to a wiper motor through a wiper linkage, and a top end to be disposed protrudingly from a body panel of the vehicle and connected to a wiper arm fitted with a wiper blade; and a pivot holder made of resin and provided with a shaft-holding portion having a shaft hole for rotatably supporting the pivot shaft and a body-fixing portion to be secured on the body panel of the vehicle, formed in one body together with the shaft-holding portion through a connecting portion; wherein the connecting portion of the pivot holder is provided with a thin-walled destructible portion to be destroyed at the time when impulsive force exceeding a predetermined value is applied on the pivot shaft.
In the wiper pivot according to this invention, if an object collides with the pivot shaft disposed protrudingly from the vehicle body panel and large impulsive force exceeding the predetermined value is applied to the pivot shaft, the destructible portion of the pivot holder is destroyed, whereby the shaft holding portion and the body-fixing portion of the pivot holder are separated from each other and the pivot holder is displaced in the direction of the vehicle body panel. Therefore, the large impulsive force can not be applied to the object even if the object collides with the pivot shaft.


REFERENCES:
patent: 5601379 (1997-02-01), Princet
patent: 6254167 (2001-07-01), Goto et al.
patent: 6317918 (2001-11-01), Kagawa et al.
patent: 6505376 (2003-01-01), Kagawa
patent: 2 733 474 (1997-06-01), None

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