JP2000011816A - Turn signal switch bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a turn signal switch bracket satisfactorily weldable to a steering column tube. SOLUTION: A turn signal switch bracket 10 has an axially protruded weld piece 26A formed on a part of the circumference of an annular flange 26, and the annular flange 26 is butted to the circumferential surface of a steering column tube 12 so that an oblong hole 30 is shifted from the weld piece 26A in the circumferential direction. When welding is performed in the contact part of the weld piece 26A with the circumferential surface of the steering column tube 12, the weldable part is sufficiently ensured without burn through because the weld piece 26A is provided, and the distortion of a plate 22 by thermal stress is also reduced since a welding position 40 is sufficiently separated from a plate 22. Accordingly, the turn signal switch bracket 10 can be satisfactorily welded to the steering column tube 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a turn signal switch bracket welded to an end of a steering column tube.

[0002]

2. Description of the Related Art Conventionally, a turn signal switch bracket (hereinafter, referred to as a bracket) is welded to a steering column tube that supports a steering shaft. A turn signal switch and a wiper switch are attached to this bracket.

[0003] A welding state of a bracket to a steering column tube in a conventional example will be described.

As shown in FIG. 5, a steering shaft 50 is rotatably supported inside a steering column tube 52. At the end of the steering column tube 52, a cancel pin hole 56 into which a cancel (return to original position) pin (not shown) of the turn signal switch is inserted is formed as a long hole extending in the circumferential direction. .

On the other hand, the bracket 54 has an annular flange 58 that contacts the outer peripheral surface of the steering column tube 52. The annular flange 58 is welded to the steering column tube 52 at a position 62 (see the hatched portion in FIG. 5) different from the cancel pin hole 56 in the circumferential direction.

[0006]

However, since the cancel pin hole 56 is formed at the end of the steering column tube 52, the annular flange 58 does not block the cancel pin hole 56. A sufficient length in the axial direction (hereinafter, referred to as flange height) cannot be secured. As a result, a portion where penetration is possible at the time of welding is limited, and a problem such as burn-through may occur.

Further, since the distance between the welding position 62 and the plate 60 of the bracket 54 is short, there is a possibility that thermal stress due to welding acts on the plate 60 to cause distortion.

[0008] In view of the above, an object of the present invention is to provide a turn signal switch bracket that is well welded to a steering column tube.

[0009]

According to the first aspect of the present invention, there is provided a turn signal switch bracket welded to an end of a steering column tube provided with a hole for a cancel pin. A plate attached to an end portion, an annular flange formed to project from a part of the plate, and abutting against an outer peripheral surface of the steering column tube; and an axial flange formed to project from a part of the annular flange; And a welding piece arranged at a position different from the cancel pin hole in the circumferential direction of the outer peripheral surface when the annular flange is in contact with the outer peripheral surface.

The operation of the first aspect will be described.

First, the annular flange of the turn signal switch bracket is brought into contact with the outer peripheral surface of the end of the steering column tube, and the welding piece is arranged at a position different from the cancel pin hole in the peripheral direction of the outer peripheral surface. In this state, the welding pieces of the turn signal switch bracket and the outer peripheral surface of the steering column tube are welded.

At this time, since welding is performed with a welding piece protruding in the axial direction from a part of the annular flange, a portion (weld piece + annular flange) that can be penetrated increases. Therefore, problems such as burn-through can be prevented.

Further, since the welding is performed by the welding pieces, the welding position is sufficiently separated from the plate of the turn signal bracket. As a result, the amount of plate (bracket) distortion caused by thermal stress during welding is reduced,
Manufacturing accuracy is improved.

Furthermore, since the height of the flange (the length in the axial direction from the plate) is partially increased by the welding piece, rattling when the turn signal switch bracket is welded to the steering column tube is reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A turn signal switch bracket according to an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 4 illustrates a schematic configuration of a portion where the steering column tube is used, and a main portion (bracket) will be described in detail below.

An end of the steering column tube 12 on the steering wheel 20 side (hereinafter referred to as a tip) is provided with a turn signal switch bracket 10 described later.
A turn signal switch 14, a wiper switch 16, and the like are mounted via a bracket (hereinafter, referred to as a bracket 10). A steering wheel 20 is mounted on a steering shaft 18 protruding from the distal end of the steering column tube 12.

As shown in FIG. 1 to FIG.
Is a turn signal switch 14 or a wiper switch 16
, A hole 24 formed at the center of the plate 22 and through which the steering column tube 12 is inserted, and an annular flange 26 formed in the axial direction of the steering column tube 12 along the hole 24. It is composed of

The annular flange 26 is formed with a welding piece 26A which protrudes in the axial direction at a predetermined position in the circumferential direction (see FIGS. 2 and 3).

At the tip of the steering column tube 12, an elongated hole 30 into which a cancel (return to original position) pin (not shown) of the turn signal switch 14 is inserted corresponds to a right-hand drive vehicle and a left-hand drive vehicle. , Left and right 2
It is formed in several places. This is because the cancel pin of the turn signal switch 14 attached to the bracket 10 is inserted into the inside of the steering column tube 12 from the long hole 30 and engages with a canceling cam (not shown) provided on the steering shaft 18. . Therefore, the turn signal switch 14 is returned to the original position by the rotation of the steering shaft 18.

The operation of the bracket 10 thus constructed at the time of welding will be described.

First, the distal end of the steering column tube 12 is inserted into the hole 24 of the bracket 10, and the annular flange 26 is brought into contact with the outer peripheral surface of the steering column tube 12. At this time, the welding piece 26A formed on the annular flange 26 is arranged at a position different from the long hole 30 of the steering column tube 12 in the circumferential direction. In the present embodiment, the welding pieces 26A are disposed at two upper and lower positions with respect to the elongated hole 30 formed at the upper side of the steering column tube 12.

In this state, the steering column tube 1
2 at the position 40 (see FIGS. 1 and 2) on the circumferential side surface where the welding piece 26A is in contact with the outer peripheral surface of the welding piece 26A.
IG) Perform welding.

At this time, the convex portion 2 for welding is attached to the annular flange 26.
Since 6A is formed in a protruding manner, a portion which can be melted during welding is sufficiently secured. Therefore, no burn-through occurs.

Further, since the welding position 40 is sufficiently separated from the plate 22, the action of thermal stress on the plate 22 during welding is small, and the amount of distortion of the plate 22 is reduced. As a result, manufacturing accuracy is improved. Furthermore, when the bracket 10 is welded to the steering column tube 12, the welding piece 26A for increasing the flange height is formed in a part of the annular flange 26, so that the rattling of the bracket 10 is reduced.

As described above, the bracket 10 of this embodiment is
Are accurately welded to the steering column tube 12.

In this embodiment, the welding position is set to the side surface of the welding piece 26A of the bracket 10, but the welding piece 26A
May be the welding position 42 (see FIG. 2) at the tip of the.

[0028]

According to the first aspect of the present invention, by providing a welding piece on a part of the annular flange of the turn signal switch bracket, it is possible to accurately weld to the steering column tube having the cancel pin hole. .

[Brief description of the drawings]

FIG. 1 is a side view showing a welded state of a turn signal switch bracket according to an embodiment of the present invention.

FIG. 2 is a plan view as viewed from an arrow A in FIG.

FIG. 3 is a perspective view showing a welded state of the turn signal switch bracket according to one embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a schematic configuration around a steering column tube according to one embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a welding state of a conventional turn signal switch bracket.

[Explanation of symbols]

 Reference Signs List 10 turn signal switch bracket 12 steering column tube 22 plate 26 annular flange 26A welding piece 30 long hole (hole for cancel pin)

Claims (1)

[Claims] 1. A turn signal switch bracket that is welded to an end of a steering column tube provided with a hole for a cancel pin and to which a turn signal switch or a wiper switch is attached, the turn signal switch bracket being attached to the end of the steering column tube. An annular flange protruding from a portion of the plate and abutting against an outer peripheral surface of the steering column tube; and an axial flange protruding from a portion of the annular flange. A weld piece arranged at a position different from the cancel pin hole in the circumferential direction of the outer peripheral surface when the outer peripheral surface comes into contact with the cancel pin hole.