JP2956433B2 - Pivot shaft mounting structure for wiper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a pivot shaft to which a base end of a wiper arm is fixed, to a panel.

[0002]

2. Description of the Related Art Conventionally, as this kind, there is, for example, one shown in FIGS. In the drawing, reference numeral 1 denotes a pivot shaft to which the base end 2a of the wiper arm 2 is serrated and connected. The pivot shaft 1 is a pivot block 3
The pivot block 3 is attached to the vehicle body panel 4 at three places by bolts 5 and nuts 6. A link piece 7 is attached to the lower end of the pivot shaft 1.

[0003] When the link piece 7 is swung by a motor or the like (not shown), the wiper arm 2 is swung through the pivot shaft 1, and a wiper (not shown) provided at the tip end of the wiper arm 2 is provided. The window panel is wiped by the blade.

However, when the pivot block 3 is in direct contact with the vehicle body panel 4, vibrations from the wiper arm 2, the link piece 7, and the like are transmitted directly to the vehicle body panel 4 during the operation of the wiper, and the vehicle interior sounds as a wiper operation sound. Is transmitted to

As a countermeasure, a rubber mount 8 may be provided between the pivot block 3 and the vehicle body panel 4 as shown in FIG.

Incidentally, as this kind, there is, for example, one described in Japanese Patent Application Laid-Open No. 2-296559.

[0007]

However, in such a conventional device, if only the rubber mount 8 is provided between the pivot block 3 and the vehicle body panel 4, the wiper arm 2 may be turned upside down. When a lateral load F acts on the pivot shaft 1, the bolt 5 slides, causing rattling and the like, which may cause noise and a decrease in wiping performance. Adverse effect due to so-called metal touch.

Accordingly, the present invention provides a pivot shaft mounting structure for a wiper which suppresses noise generation and a decrease in wiping performance by preventing a bolt from sliding to prevent rattling and the like, and at the same time, prevents a bad influence by a so-called metal touch. The challenge is to provide

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and a pivot shaft to which a base end portion of a wiper arm is fixed is rotatably mounted on a pivot block, and the pivot block is mounted on the pivot block. A wiper pivot shaft mounting structure screwed at several places with a rubber mount interposed on the back side of the panel, wherein an upwardly protruding embossed portion is formed at a screwing position of the panel, and the rubber mount A protrusion that is shaped to match the embossed portion and is inserted into the embossed portion, and a wiper pivot shaft mounting structure in which a screw is inserted and screwed into the protrusion and the upper surface of the embossed portion. Features.

[0010]

According to this means, the wiper arm is swung through the pivot shaft, and the window panel is wiped by the wiper blade provided at the tip of the wiper arm.

If a lateral load acts on the screw when the wiper arm is turned over at this time, the load is borne by the side surface of the embossed portion via the protrusion of the rubber mount. As described above, by receiving a load in a wide range of the side surface portion of the embossed portion, the amount of compression of the rubber mount projection is reduced, so that the sliding amount of the screw can be extremely reduced. Therefore, rattling and the like can be suppressed, and noise generation and a decrease in wiping performance can be reduced. Further, since the sliding amount of the screw can be extremely small, so-called metal touch in which the screw contacts the panel can be prevented.

Further, by forming a plurality of embossed portions, the rigidity of the pivot shaft mounting surface portion of the vehicle body panel can be improved, and vibration can be suppressed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention.

First, the structure will be described. In the figure, reference numeral 11 denotes a pivot shaft, which is connected to the pivot block 1.
2 and a pivot block 1
2 is attached to the vehicle body panel 13 as a “panel” with bolts 15 and nuts 16 as “screw” in several places with a rubber mount 14 interposed.

More specifically, the vehicle body panel 13 is formed with a shaft insertion hole 13a through which the pivot shaft 11 is inserted, and is formed at a total of three screwing positions around the shaft insertion hole 13a. A total of three frustoconical embossed portions 13b are formed, and a bolt insertion hole 13d through which the bolt 15 is inserted is formed in the upper surface portion 13c of the embossed portion 13b.

The rubber mount 14 has a size that covers the entire upper surface of the pivot block 12, has a shape conforming to the shape of the embossed portion 13b, and is inserted into and fitted to the embossed portion 13b. Are formed. The protrusion 14a has a bolt insertion hole 14b through which the bolt 15 is inserted.

The upper end 11 of the pivot shaft 11
The base end 17a of the wiper arm 17 is attached to a, and the link piece 18 is attached to the lower end 11b.

In such a structure, the link piece 1
8 is swung by a motor or the like (not shown),
The wiper arm 17 is swung via the pivot shaft 11, and the window panel is wiped by a wiper blade (not shown) provided at the tip of the wiper arm 17.

When a lateral load F is applied to the bolt 15 when the wiper arm 17 is turned over at this time, the load F is applied to the embossed portion 1 via the protrusion 14a of the rubber mount 14.
3b. Thus, the wide range h of the side surface portion 13e of the embossed portion 13b is obtained.
Receiving the load F, the rubber mount projection 14
Since the compression amount of “a” becomes small, the sliding amount of the bolt 15 can be extremely reduced. Therefore, rattling and the like can be suppressed, and noise generation and a decrease in wiping performance can be reduced. Further, since the sliding amount of the bolt 15 can be made extremely small, so-called metal touch in which the bolt 15 contacts the vehicle body panel 13 can be prevented.

Further, by forming the plurality of embossed portions 13b, the rigidity of the mounting surface of the pivot shaft 11 of the vehicle body panel 13 can be improved, and vibration can be suppressed.

[0022]

As described above, according to the present invention, when a lateral load is applied to the bolt when the wiper arm is turned over or the like, the load is applied to a wide area of the side surface of the embossed portion. Accordingly, the amount of compression of the rubber mount projection is reduced, so that the sliding amount of the bolt can be extremely reduced, so that rattling and the like can be suppressed, and noise generation and reduction in wiping performance can be reduced. Further, since the sliding amount of the bolt can be made extremely small, so-called metal touch in which the bolt contacts the vehicle body panel can be prevented.

Further, by forming a plurality of embossed portions, it is possible to improve the rigidity of the pivot shaft mounting surface of the vehicle body panel, and to exert a practically useful effect that vibration can be suppressed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view corresponding to FIG. 1 showing a conventional example.

FIG. 3 is a bottom view of FIG. 2 showing the conventional example.

FIG. 4 is a sectional view corresponding to FIG. 2 and showing a modification of the conventional example.

[Explanation of symbols]

 11 Pivot shaft 12 Pivot block 13 Body panel (panel) 13a Shaft insertion hole 13b Embossed portion 13c Top surface 14 Rubber mount 14a Projection 15 Bolt (screw) 16 Nut 17 Wiper arm 17a Base end

Claims (1)

(57) [Claims] 1. A pivot shaft to which a base end portion of a wiper arm is fixed is rotatably attached to a pivot block, and the pivot block is screwed at several places with a rubber mount interposed on the back side of the panel. A pivot shaft mounting structure for a wiper, wherein an embossed portion projecting upward is formed at a screwing position of the panel, and a projection adapted to the rubber mount and having a shape adapted to the embossed portion is inserted into the embossed portion. A pivot shaft mounting structure for a wiper, wherein a screw is inserted into the projection and the upper surface of the embossed portion and screwed.