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Safety washer for improved control of bolt tension and high antiloosening effect

A technology of gaskets and bolts, applied in the field of gaskets

Active Publication Date: 2021-11-26
GROWERMETAL股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these known structures cannot in all cases guarantee that the washer will not slide on the socket when the bolt is tightened on the socket (which is necessary to induce a well-defined tension on the bolt)

Method used

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  • Safety washer for improved control of bolt tension and high antiloosening effect
  • Safety washer for improved control of bolt tension and high antiloosening effect
  • Safety washer for improved control of bolt tension and high antiloosening effect

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Experimental program
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Effect test

Embodiment Construction

[0103] exist Figure 1 to Figure 6 In , different views of an embodiment of an M10 gasket 1 of the present invention (washer #1) are shown. Washer #1 (and washer #3) is assumed to be used in a bolt / washer / socket assembly that is tightened by rotating the bolt head clockwise relative to the washer. Therefore, the tightening direction of washer #1 (and washer #3) is counterclockwise rotation, and the loosening direction is clockwise rotation relative to the bolt head. figure 1 The lower head surface 4 of the gasket 1 is shown. The diameter of the gasket from the inner circumference 5 to the outer circumference 6 is 17.4 to 17.7 mm. The inner diameter of the central hole 3 delimiting the washer is 10.5 to 10.7 mm, through which the shaft of the bolt to be fastened to the socket extends. Therefore, the width of the gasket is 3.35 to 3.6mm.

[0104] The thickness of the gasket is 2.25 to 2.5mm.

[0105] from figure 1 It can further be seen in that on the lower head surface 4 ...

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PUM

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Abstract

The present invention relates to a washer having a having central hole (3), a bolt under head engaging surface (4) and a bearing engaging surface (14), wherein - a serration on the bolt under head engaging surface (4) comprises a saw tooth (7) structure, the edges of said saw tooth structure (10) having a boomerang-like shape, - a serration on the bearing engaging surface (14) comprises a plurality of teeth (15) which in top view of the bolt under head engaging surface run in the direction from the inner (5) to the outer (6) circumference of the bearing engaging surface (14) and which are inclined with regard to radially extending straight lines originating from the washer center (2), and - the top sections of the edges of both the teeth (17) and the saw teeth (18) in cross-sectional view of the serrations are rounded.

Description

technical field [0001] The invention relates to a washer having serrations on both surfaces. Background technique [0002] The washers are used, for example, to prevent unwanted loosening of the threaded bolts which are screwed onto the respective sockets, by inducing tension on the bolts in the tightened state. The induced tension is related to the resistance to loosening the bolt from the socket. This tension is determined on the one hand by the friction between the washer and the bolt, and on the other hand by the friction between the washer and the socket. [0003] In practice, a certain torque is applied to the bolt head, which in turn should be translated into a well-defined tension. However, this only applies if the friction between the washer and the surface it is to engage with is also well defined. [0004] This is usually the case where the underside of the bolt head (bolt underhead) is to be engaged with one surface of the washer, since the bolt material and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B39/282F16B43/00
CPCF16B39/282F16B43/00F16B39/24
Inventor 保罗·卡塔内奥
Owner GROWERMETAL股份公司