Bolt fastening of foil

Abstract

To prevent a wheel falling accident due to breakage of a wheel bolt, where for this purpose, it is essential to maintain specified bolt fastening force.SOLUTION: There is provided a structure in which a bolt 5 passing through a hub 1, a brake drum 2, a wheel 3, and a wheel 4 is fastened by a nut 6 through a bolt fastening force detecting seat composed of a disc spring 7 and a ring for detecting its deflection of the disc spring.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to bolt fastening of a foil.

Background Art

[0002]

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Prevent wheel detachment accidents caused by wheel bolt breakage.

Means for Solving the Problems

[0006] Change the structure of tightening the brake drum and the wheel to the nut on the conventional hub, and adopt a structure in which bolt fastening is performed through a bolt tightening force detection seat capable of detecting the deflection of the disc spring with a ring.

Effects of the Invention

[0007] An appropriate tightening force can be obtained by the tightening force regulating function of the bolt tightening force detection seat. The tightened state can be confirmed by whether the ring can rotate. Since the tightening force is maintained by the disc spring, safety is ensured. Of course, a torque wrench is not required.

[0008] The inner nut, which has a problem in fastening management as described in the above report, can be eliminated.

Brief Description of the Drawings

[0009]

Figure 1

Modes for Carrying Out the Invention

[0010] The following describes embodiments of the present invention with reference to the drawings.

Examples

[0011] In FIG. 1, a bolt 5 having a tip portion 5a penetrating through a hub 1, a brake drum 2, a wheel 3, and a wheel 4 is fastened by a nut 6 via a bolt tightening force detection seat. The bolt tightening force detection seat is composed of a disc spring 7 and a ring 8. By tightening the nut, the gap G between the disc spring 7 and the ring 8 becomes zero, and it becomes difficult for the ring 8 to rotate. At this point, the tightening force becomes a specified value.

Examples

[0012] In FIG. 2, it is an example in which a bolt tightening force detection seat composed of a disc spring 9, a ring 10, and a washer 11 is mounted. By tightening the nut, the gap G between the ring 10 and the washer 11 becomes zero, and it becomes difficult for the ring 10 to rotate. At this point, the tightening force becomes a specified value.

Industrial Applicability

[0013] It is used in the industry of manufacturing automobiles.

Description of Reference Numerals

[0013] 1 hub, 2 brake drum, 3 wheel, 4 wheel, 5 bolt, 6 nut, 7 disc spring, 8 ring, 9 disc spring, 10 ring, 11 washer

Claims

【Claim 1】 ［００１１］ A structure in which a bolt 5 passing through a hub 1, a brake drum 2, a wheel 3, and a wheel 4 is fastened by a nut 6 via a bolt tightening force detection seat composed of a disc spring 7 and a ring 8 or a disc spring 9, a ring 10, and a washer 11 for detecting its deflection.

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