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Self-locking fastening device

A fastening device and self-locking technology, applied in the direction of locking fasteners, threaded fasteners, washers, etc., can solve the problems of automatic loosening of screws and loss of pre-stretching effect.

Inactive Publication Date: 2007-07-04
RUIA GLOBAL FASTENERS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, overscrewing by a few tenths of a centimeter can lead to a loss of the pretensioning effect and the risk of the screw connection being loosened automatically

Method used

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Examples

Experimental program
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Embodiment Construction

[0015] Figure 1 shows a first embodiment of the washer of the invention for a self-locking fastening device. The shape of the washer 10 is the same as that of ordinary washers, and it has a central hole 11 for allowing threaded bodies (bolts, screws) to pass through. Compared with ordinary gaskets, the gasket according to the present invention is radially arched from the inside to the outside and is made of a material with sufficient elasticity.

[0016] In FIG. 1 , the corresponding screw head or nut is located above the washer 10 as shown, and the component to be fastened is located below the washer. In this way, the washer 10 is convex in the direction of the screw head or nut and concave in the direction of the assembly. In actual use, towards the top of the washer 10 of the screw head or the nut, a suitable reinforcing rib 12 is arranged directly near the center hole, and its extension length is about two-thirds of the washer width.

[0017] In the same way, the undersi...

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PUM

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Abstract

Disclosed is a self-locking fastening device comprising a screw or nut for fastening at least one first part to a second part and a shim ( 10 ) which is provided with a central borehole ( 11 ). The two surfaces of said shim ( 10 ) comprise means ( 12,14 ) which are fixed within or to the surfaces of the first part and the screw or nut no later than the time that the fastening device is tightened such that self-actuated unscrewing is prevented. The shim ( 10 ) is configured in a resilient manner such that said shim ( 10 ) can be compressed counter to the resilience thereof during tightening of the fastening device.A self-locking fastening device which includes a screw or nut for fastening at least one first part to a second part and a shim ( 10 ) which is provided with a central borehole ( 11 ). The two surfaces of the shim ( 10 ) include rib profiles ( 12,14 ) which are fixed within or to the surfaces of the first part and the screw or nut no later than the time that the fastening device is tightened such that self-actuated unscrewing is prevented. The shim ( 10 ) is configured in a resilient manner such that the shim ( 10 ) can be compressed counter to the resilience thereof during tightening of the fastening device.

Description

technical field [0001] The present invention relates to a self-locking fastening device comprising a screw or nut for fastening at least one first component to a second component, the fastening device comprising a washer provided with a central hole, the washer The surface comprises elements fixed to the surface of the first component and the screw or nut during fastening of the fastening device to prevent the screw or nut from loosening automatically. Background technique [0002] Such a self-locking fastening device comprising a washer ribbed on both sides has been disclosed in EP426895B1. [0003] The self-locking fastening device disclosed therein can become a safety device with the same effect as the self-locking screw described in DE2556985C2 as long as sufficient pretension is carried out in the screw connection. If the pretension of the connection becomes loose due to overtightening, it cannot self-lock and thus cannot prevent the nut from loosening. Since the posi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B39/24F16B43/00
CPCF16B39/24F16B43/00
Inventor J·埃色尔
Owner RUIA GLOBAL FASTENERS AG
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