JPS5933051B2 - How to manufacture a vehicle steering wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for manufacturing a handle for a vehicle such as a bicycle, and more particularly to a method for manufacturing a handle for a vehicle characterized by a method of fixing a handle lug and a handle post.

Generally, a handle for a vehicle such as a bicycle is constructed by fixing a handle lug 2 to the upper end of a handle post 1 and fixing a handlebar 3 to the handle lug 2, as shown in FIG.

As the handle lug 2, a steel plate lug formed by press working is generally widely used, and a die-cast lug made of aluminum or the like is sometimes used. Therefore, in the conventional steering wheel for this type of vehicle, the steering wheel lug 2
To fix the handle post 1 and the handle post 1, a method is usually adopted in which the handle post 1 and the handle lug 2 are fixed by brazing or electric welding, as shown in FIG. The outer surface of the portion 4 is treated by plating or para-polishing.

In FIG. 2, numeral 5 is a bolt for fixing the handle post, and numeral 6 is a bolt and nut for fixing the handlebar.

However, when the two are bonded together by brazing or electric welding, surface treatment of the joint portion 4 is required after bonding, which increases the number of work steps, making it difficult to reduce manufacturing costs.

The present invention was devised to solve the above problems, and its purpose is to eliminate the need for surface treatment, thereby reducing manufacturing costs by omitting work steps. An object of the present invention is to provide a method for manufacturing a vehicle steering wheel that can achieve the following.

A method for manufacturing a vehicle handle according to the first invention of the present application includes: inserting the upper end of the handle post into the post insertion cavity of the handle lug, which has an opening on the handlebar support hole side of the post insertion arm; A feature lies in that the handle post and the handle lug are fixed to each other by bulging the side wall at the upper end of the post toward the opening side.

Further, in the method for manufacturing a vehicle hash handle according to the second invention of the present application, in the first invention, a bolt insertion hole is bored in the upper wall surface of the boss insertion cavity of the handle lug, and the outer peripheral edge of the bolt insertion hole is inserted into the handle lug. The feature lies in that the upper end of the handle post is fixed by bending the upper end of the post inward.

Embodiments of the present invention will be described below based on the drawings.

3 and 4 relate to the first embodiment of the present invention, and FIG.
The figure is a longitudinal cross-sectional view showing the handle for a vehicle, and FIG. 4 is a cross-sectional view from the perspective of FIG. 3.

The handle rack 2 is integrally manufactured by pressing a thin steel plate with a thickness of 2 to 3W1L, and includes a post insertion cavity 7 for inserting the upper end of the handle post 1; A handlebar support hole 8 is formed perpendicularly to the handlebar post 1 for inserting and fixing the handlebar 3 therethrough.

The post insertion cavity 7 has a handle bottom insertion hole 7 below.
d, an opening 7c is formed on the handle support hole 8 side}
The upper wall surface 7a and the side wall surfaces are surrounded by steel plates.

The handlebar support hole 8 is formed of two upper support plates 9 and a lower support plate 10 that protrude to one side, and a bolt for fixing the handlebar is inserted into the tips of both support plates 9 and 10. A hole 11 is bored.

In this embodiment, a press-formed steel plate rack is used as the handle rack 2, but a metal plate rack made of a material other than steel plate or a die-casting process other than press-forming may be used. Of course, a rack can also be used.

The handle post 1 is made of a clad pipe, and the outer surface of the steel pipe 1b is VCO. 2 to 0.3 wt of stainless steel 1c is fixed.

The upper end of the handle post 1 is slightly rounded in advance in the diameter reduction direction by a brace.

This makes it extremely easy to insert the handle post 1, and the upper end of the handle post can be more firmly supported and fixed by the burring process, which will be described later. Further, in this embodiment, a clad pipe is used for the handle post 1, but it goes without saying that vibrators made of various other materials may be used.

Next, a method for manufacturing vehicle soddles will be explained.

First, the handle post 1 whose upper end has been reduced in diameter by rounding is inserted into the post insertion cavity 7 of the handle lug 2, and its upper end is brought into contact with the upper wall surface 7a of the post insertion cavity 7. let

Next, the bolt insertion holes 12 pre-drilled in the upper wall surface 7ar are burred, and the outer peripheral edge 12a of the bolt insertion holes 12 is bent inward of the handle post 1 to fix its upper end. do.

Here, we have explained the method of drilling the bolt insertion hole 12 in advance and then performing the burring process, but after inserting the handle post 1, drilling the bolt insertion hole 12 and performing the burring process. may be performed at the same time. Furthermore, in this embodiment, the outer diameter of the handle post 1 is 22 mm.
The wall thickness is w1n and the wall thickness is 1.7wn, and the burring hole diameter is selected to be approximately 121m.

As a result, the washer 1 of the fixing bolt 5 of the handle post 1
Although a stepped type was used for No. 3, a flat washer can be used if the burring hole diameter is set to 10W1fi or less. By applying the barring force, even if the protrusion length t of the lower end outer circumferential portion 7b of the boss insertion cavity 7 is short, the perpendicularity between the handle rack 2 and the handle post 1 can be accurately regulated. The adhesion strength of both is further improved.

If the protruding length t of the tube can be made relatively long, the burring process can be omitted, and sufficient fixing strength can be obtained only by the bulging process described below.

When the burring process is completed, the handle rack 2 is fixed to a predetermined jig, and a hard rubber material for bulging is inserted inside the upper end of the handle post 1, and the upper end of the handle post 1 is The side wall 1a of
Opening 7c of the post insertion cavity 7 on the handlebar support hole 8 side
The cross section is bulged out in a substantially arc shape in the direction.

Through the bulging process, the outer peripheral surface of the upper end of the handle post 1 and the handle rack 2 are connected to each other through the bulging part of the side wall 1a.
and the inner circumferential surface of the post insertion cavity 7 are tightly pressed together,
The handle post 1 and handle lug 2 are fixed very firmly and at a predetermined mounting angle.

The adhesion strength of both is well above the specified value,
No loosening occurs due to vibration or tension.

5 and 6 relate to a second embodiment of the present invention, in which an opening 7c of the post insertion cavity 1 on the side of the handlebar support hole 8 is formed in a square shape, and the opening 7c is inserted into the square opening 7c. The side wall 1a at the upper end of the handle post 1 is bulged.

In this way, the shape of the bulging portion formed by the bulging process can be arbitrarily selected.

As described above, according to the present invention, the following excellent effects can be achieved.

(As in the case of fixing by zero welding or brazing, surface finishing treatment of the joint part is not required at all, and the manufacturing cost of the handle can be significantly reduced.

(2) Even handle racks and handle posts made of materials that are difficult to weld or braze can be easily fixed, making it possible to combine various different metals.

In particular, the advantage of being able to use an inexpensive clad pipe for the handle post is extremely great, and a handle with excellent corrosion resistance can be manufactured at a very low cost.

(3) By applying the burring process, the positioning of the handle post and the handle rack becomes easier, and the adhesion strength between the two is further strengthened.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an outline of a vehicle handle. FIG. 2 is a longitudinal sectional view of a vehicle handle obtained by a conventional manufacturing method. FIG. 3 is a longitudinal sectional view of the vehicle handle according to the first embodiment of the present invention. Figure 4 shows
FIG. 4 is a cross-sectional view of FIG. 3 as viewed from E. FIG. 5 is a longitudinal sectional view of a vehicle handle according to a second embodiment of the present invention. 6th
The figure is a cross-sectional view of Rollo in FIG. 5. 1...
Handle post, 1a...Side wall, 2...
・Handle rack, 7...Post insertion cavity, 7
a...Top wall surface, 7c...Opening, 8...
...Handlebar support hole, 12...Bolt insertion hole, 12a...Outer peripheral edge.

Claims (1)

[Scope of Claims] 1. Insert the upper end of the handle post 1 into the post insertion cavity 7 of the handle lug 2, which has an opening 7c formed on the side of the handlebar support hole 8 of the post insertion cavity 7. A method for manufacturing a vehicle handle, characterized in that the handle post 1 and the handle lug 2 are fixed together by bulging the side wall 1a at the upper end of the handle post 1 toward the opening 7c. 2. Insert the upper end of the handle post 1 into the post insertion cavity 7 of the handle lug 2, which has an opening 7c formed on the side of the handlebar support hole 8 of the post insertion cavity 7, and insert the upper end of the handle post 1 into the post insertion cavity 7. In the method for manufacturing a vehicle handle in which the handle post 1 and the handle lug 2 are fixed by expanding the side wall 1a toward the opening 7c, the upper wall surface 7a of the post insertion cavity 7 of the handle lug 2 is A method for manufacturing a vehicle handle, characterized in that the upper end of the handle post 1 is fixed by drilling a bolt insertion hole 12 and bending the outer peripheral edge 12a inward of the upper end of the handle post 1.