Vehicle stabilizer, processing device for eye portion of stabilizer, and processing method for eye portion

Patent metadata

Field	Value
Publication number	US-10696122-B2
Application number	US-201815954793-A
Country	US
Kind code	B2
Filing date	Apr 17, 2018
Priority date	Oct 20, 2015
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

An annular reference surface is formed around a through-hole of an eye portion. A distal-end-side curved portion is formed at a first corner portion, on an outer side of the annular reference surface. The thickness of the distal-end-side curved portion is reduced in a range of a length from the first flat surface toward the distal end surface. A hole-side curved portion whose thickness is reduced toward an inner surface of the through-hole is formed at a second corner portion, on an inner side of the annular reference surface. The length of the hole-side curved portion is less than the length of the distal-end-side curved portion. The hole-side curved portion is curved with a greater curvature than that of the distal-end-side curved portion.

First claim

What is claimed is:

1. A vehicle stabilizer including eye portions on both ends, each of the eye portions comprising:
a first flat surface and a second flat surface that are parallel to each other;
a trim portion which is located at a distal end of the eye portion, and includes a distal end surface at a right angle to the first flat surface and the second flat surface;
a through-hole which includes an inner surface at a right angle to the first flat surface and the second flat surface, and is open on the first flat surface and the second flat surface;
a flat annular reference surface which is a part of the first flat surface, and is formed around an opening of the through-hole;
a distal-end-side curved portion which is formed at a first corner portion where the first flat surface intersects the distal end surface, on an outer side of the annular reference surface, a thickness of the distal-end-side curved portion being reduced in a range of a first length from the first flat surface toward the distal end surface; and
a hole-side curved portion which is formed at a second corner portion where the first flat surface intersects the inner surface of the through-hole all around the opening, on an inner side of the annular reference surface, a thickness of the hole-side curved portion being reduced in a range less than the first length from the first flat surface toward the inner surface, the hole-side curved portion being curved with a curvature greater than that of the distal-end-side curved portion.

2. The vehicle stabilizer of claim 1 , wherein a distance from an outer circumference of the annular reference surface to the distal end surface is less than a distance from the outer circumference of the annular reference surface so the opening.

3. The vehicle stabilizer of claim 2 , wherein the hole-side curved portion includes a trim-side curved surface having a second length that is formed at a position near the trim portion, and a counter-trim-side curved surface having a third length that is formed on a side far from the trim portion, and the third length is less than the second length.

4. The vehicle stabilizer of claim 3 , wherein a curvature of the counter-trim-side curved surface is greater than a curvature of the trim-side curved surface.

5. The vehicle stabilizer of claim 1 , wherein the hole-side curved portion includes a trim-side curved surface having a second length that is formed at a position near the trim portion, and a counter-trim-side curved surface having a third length that is formed on a side far from the trim portion, and the third length is less than the second length.

6. The vehicle stabilizer of claim 5 , wherein a curvature of the counter-trim-side curved surface is greater than a curvature of the trim-side curved surface.

Assignees

• Nhk Spring Co Ltd

Inventors

• Sakurai Yasuharu
• Koshita Yoshihiro
• Nishikawa Akihiko
• Otani Akifumi

Classifications

• B21D53/88 Primary

  other parts for vehicles, e.g. cowlings, mudguards · CPC title

• B21D45/006

  Stripping-off devices · CPC title

• B21D28/24

  Perforating, i.e. punching holes · CPC title

• B21J5/10

  Piercing billets (in combination with extrusion B21C23/00) · CPC title

• B21K21/12

  Shaping end portions of hollow articles · CPC title