Coupling structure including stud bolt

Patent metadata

Field	Value
Publication number	US-9638226-B2
Application number	US-201514824254-A
Country	US
Kind code	B2
Filing date	Aug 12, 2015
Priority date	Aug 29, 2014
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A stud bolt has a first thread portion, a second thread portion, an engagement portion and a large diameter portion. The first thread portion is screwable into a first member about a screw axis. The second thread portion is screwable into a second member about the screw axis and is provided coaxially with the first thread portion. The engagement portion is provided on a side of the second thread portion, which is opposite from the first thread portion. The large diameter portion has a circular cross-section perpendicular to the screw axis. The large diameter portion is located between the first thread portion and the second thread portion. An outer diameter of the large diameter portion is larger than an outer diameter of the first thread portion and the outer diameter of the second thread portion.

First claim

What is claimed is:

1. A coupling structure comprising:
a stud bolt including:
a first thread portion screwable into a first member about a screw axis;
a second thread portion screwable into a second member about the screw axis and being provided coaxially with the first thread portion;
an engagement portion provided on a side of the second thread portion, which is opposite from the first thread portion, an outer diameter of the engagement portion being smaller than an outer diameter of the second thread portion, the engagement portion being engageable with a fixing tool; and
a large diameter portion having a circular cross-section that is perpendicular to the screw axis, the large diameter portion being located between the first thread portion and the second thread portion, an outer diameter of the large diameter portion being larger than an outer diameter of the first thread portion and the outer diameter of the second thread portion,

a second member having a hole through which the second thread portion extends, the second member contacting the large diameter portion; and
a nut engaged with the second thread portion, the nut fixing the second member on the large diameter portion, wherein
the second member has a shielding portion that is positioned on an outside of the nut in a radial direction of the nut; and
the shielding portion screens the nut and the engagement portion from outside the first member and the second member.

2. The coupling structure according to claim 1 , wherein
the large diameter portion has a first contact surface that is perpendicular to the screw axis and faces to the first thread portion, and
the large diameter portion has a second contact surface that is perpendicular to the screw axis and faces to the second thread portion.

3. The coupling structure according to claim 1 , wherein the large diameter portion has a circular cylindrical shape.

4. The coupling structure according to claim 1 , wherein the large diameter portion has a tapered shape in which the large diameter portion gradually increases in outer diameter with distance from the first thread portion toward the second thread portion.

5. The coupling structure according to claim 1 , further comprising a cylinder member that surrounds an outside of the large diameter portion of the stud bolt in a radial direction of the large diameter portion.

6. The coupling structure according to claim 5 , further comprising a welded portion in which the first member or the second member is directly fixed to the cylinder member.

7. The coupling structure according to claim 5 , wherein the cylinder member includes a continuous body having a C shape to partially surround the outside of the large diameter portion in the radial direction.

8. The coupling structure according to claim 5 , wherein
the cylinder member includes a continuous body having an O shape and extending in a circumferential direction of the large diameter portion to enclose the large diameter portion.

9. The coupling structure according to claim 1 , wherein the female thread portion includes an insert nut.

10. The coupling structure according to claim 1 , wherein the engagement portion is positioned at an end of the stud bolt.

11. The coupling structure according to claim 1 , further comprising:
a first member having a hole through which the first thread portion of the stud bolt extends, the first member contacting the large diameter portion; and
a female thread portion provided inside the hole of the first member and engaged with the first thread portion, the female thread portion fixing the first member on the large diameter portion.

12. A coupling structure comprising:
a stud bolt including a large diameter portion, a first thread portion provided on one side of the large diameter portion coaxially with the large diameter portion, and a second thread portion provided on another side of the large diameter portion coaxially with the large diameter portion, an outer diameter of the large diameter portion being larger than an outer diameter of the first thread portion and an outer diameter of the second thread portion;
a second member having a hole through which the second thread portion of the stud bolt extends, the second member contacting the large diameter portion;
a nut engaged with the second thread portion, the nut fixing the second member on the large diameter portion; and
a cylinder member surrounding an outside of the large diameter portion of the stud bolt in a radial direction of the large diameter portion, wherein
the second member has a shielding portion that is positioned on an outside of the nut in a radial direction of the nut, and
the shielding portion screens the nut and the engagement portion from outside the first member and the second member.

13. The coupling structure according to claim 12 , further comprising:
a first member having a hole through which the first thread portion of the stud bolt extends, the first member contacting the large diameter portion; and
a female thread portion provided inside the hole of the first member and engaged with the first thread portion, the female thread portion fixing the first member on the large diameter portion.

Assignees

• Denso Corp

Inventors

• Takahashi Tomohiro
• Nakayama Seiji

Classifications

• F16B5/0275 Primary

  the screw-threaded element having at least two axially separated threaded portions (F16B5/0283 takes precedence) · CPC title

• F16B41/005

  Measures against unauthorised operation of bolts, nuts or pins (F16B23/0007, F16B23/0061, F16B23/0069, F16B23/0076 and F16B31/02 take precedence; locks, keys E05B; for valves, taps or cocks F16K35/00; for pipe-joints with swivel-nuts F16L19/005) · CPC title