JPH0776265A - Pivot shaft installation structure for wiper - Google Patents

Abstract

PURPOSE:To suppress the production of noise and lowering of the wiping performance and prevent the adverse influence due to the so-called metal touch by preventing chattering, etc., by preventing the slide of a bolt. CONSTITUTION:Concerning a pivot shaft installation structure for a wiper, a pivot shaft 11 on which the basic edge part 17a of a wiper arm 17 is fixed is installed in a rotatable manner on a pivot block 12, and the pivot block 12 is screw-fixed at several places on the reverse surface side of a car body panel 13, with a rubber mount 14 interposed, by bolts 15 and nuts 16. Further, an embossed part 13b which projects upward at the screw fitting position of the car body panel 13 is formed, and a projection part 14a which has the shape fitted with the embossed part 13b and is inserted into the embossed part 13b is formed on a rubber mount 14, and a bolt 15 is inserted into the projection part 14a and the upper surface part 13c of the embossed part 13b.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as this type, there is one shown in FIGS. 2 and 3, for example. In the figure, reference numeral 1 is a pivot shaft to which the base end portion 2a of the wiper arm 2 is serration-coupled, and the pivot shaft 1 is a pivot block 3
The pivot block 3 is attached to the vehicle body panel 4 at three locations by means of bolts 5 and nuts 6. A link piece 7 is attached to the lower end of the pivot shaft 1.

When the link piece 7 is swung by a motor (not shown) or the like, the wiper arm 2 is swung via the pivot shaft 1, and a wiper (not shown) provided at the tip of the wiper arm 2 is swung. 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 directly transmitted to the vehicle body panel 4 during the operation of the wiper, and as a wiper operation sound, the vehicle interior Be transmitted to.

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

An example of this type is disclosed in Japanese Patent Laid-Open No. 2-296559.

[0007]

However, in such a conventional device, it is necessary to dispose the rubber mount 8 between the pivot block 3 and the vehicle body panel 4 when the wiper arm 2 is reversed. When a lateral load F is applied to the pivot shaft 1, the bolt 5 may slide and cause rattling, which may cause noise and a reduction in wiping performance, and the bolt 5 may come into contact with the vehicle body panel 4. , The so-called metal touch has an adverse effect.

In view of this, the present invention suppresses the occurrence of noise and the deterioration of the wiping performance by preventing the bolt from sliding to prevent rattling, and at the same time, prevents the so-called metal touch from adversely affecting the pivot shaft mounting structure for the wiper. The challenge is to provide.

[0009]

The present invention has been made in view of the above problems, and a pivot shaft to which a base end portion of a wiper arm is fixed is rotatably attached to a pivot block. A structure for attaching a pivot shaft for a wiper, which is screwed at several places with a rubber mount interposed on the back side of the panel, wherein an embossed portion protruding upward is formed at the screwing position of the panel, and the rubber mount is also provided. In addition, a protrusion having a shape adapted to the embossed portion and inserted into the embossed portion is formed, and a screw is inserted into the protrusion and the upper surface of the embossed portion to fix the screw to the pivot shaft mounting structure for the wiper. It has a feature.

[0010]

[Operation] According to such means, the wiper arm is swung via the pivot shaft, and the window panel is wiped by the wiper blade provided at the tip of the wiper arm.

At this time, when a lateral load is applied to the screw when the wiper arm is reversed, this load is borne by the side surface of the embossed portion via the protrusion of the rubber mount. In this way, by receiving a load in a wide range of the side surface of the embossed portion, the amount of compression of the rubber mount protrusion becomes small, so that the sliding amount of the screw can be made extremely small. Therefore, it is possible to suppress backlash and the like, and reduce noise generation and deterioration of the wiping performance. Further, since the sliding amount of the screw can be made extremely small, it is possible to prevent a so-called metal touch in which the screw comes into contact with the panel.

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 is a pivot shaft, and this pivot shaft 11 is the pivot block 1.
This pivot block 1 is rotatably attached to 2
No. 2 is attached to a vehicle body panel 13 as a "panel" with bolts 15 and nuts 16 as "screws" at several places with a rubber mount 14 interposed.

More specifically, the body panel 13 is formed with a shaft insertion hole 13a through which the pivot shaft 11 is inserted, and a swelling upward is formed at a total of three screwing positions around the shaft insertion hole 13a. Embossed portions 13b having a truncated cone shape are formed at a total of three places, and bolt insertion holes 13d through which the bolts 15 are inserted are formed in the upper surface portion 13c of the embossed portions 13b.

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

The upper end portion 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 this structure, the link piece 1
8 is swung by a motor (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.

At this time, when a lateral load F is applied to the bolt 15 when the wiper arm 17 is reversed, this load F is applied to the embossed portion 1 via the protrusion 14a of the rubber mount 14.
It will be borne by the side surface part 13e of 3b. Thus, the wide range h of the side surface portion 13e of the embossed portion 13b
The load F is applied to the rubber mount protrusion 14
Since the compression amount of “a” becomes small, the sliding amount of the bolt 15 can be made extremely small. Therefore, it is possible to suppress backlash and the like, and reduce noise generation and deterioration of the wiping performance. Further, since the sliding amount of the bolt 15 can be made extremely small, it is possible to prevent the so-called metal touch in which the bolt 15 comes into contact with the vehicle body panel 13.

Furthermore, by forming a plurality of embossed portions 13b, the rigidity of the surface of the vehicle body panel 13 on which the pivot shaft 11 is attached 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 reversed, the load is received in a wide range on the side surface of the embossed portion. As a result, the amount of compression of the rubber mount projection is reduced, and the amount of slide of the bolt can be made extremely small, so that rattling and the like can be suppressed, and noise generation and reduction in wiping performance can be reduced. Moreover, since the amount of sliding of the bolt can be made extremely small, it is possible to prevent a so-called metal touch in which the bolt comes into contact with the vehicle body panel.

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, which is a practically useful effect.

[Brief description of 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 cross-sectional view corresponding to FIG. 2 showing an improved conventional example.

[Explanation of symbols]

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

Claims (1)

[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 protruding upward is formed at a screwing position of the panel, and a protrusion having a shape adapted to the embossed portion is inserted into the rubber mount on the rubber mount. A pivot shaft mounting structure for a wiper, characterized in that a screw is inserted into the protrusion and the upper surface of the embossed portion to fix the screw.