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Electrically conductive screw connection and special bushing for a screw connection of said type

A technology of conductive screws and connection structures, applied in the direction of conductive connections, connecting components, connections, etc., can solve problems such as processing tolerances and contact problems

Inactive Publication Date: 2014-03-12
RUIA GLOBAL FASTENERS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This solution proved to be reliable in principle, but when such a screw is replaced during use, contact problems may arise due to machining tolerances

Method used

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  • Electrically conductive screw connection and special bushing for a screw connection of said type
  • Electrically conductive screw connection and special bushing for a screw connection of said type
  • Electrically conductive screw connection and special bushing for a screw connection of said type

Examples

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Embodiment Construction

[0026] figure 1 The screw connection according to the invention is shown in a schematic cross-sectional view along the axis of rotation of the screw.

[0027] In the embodiment described here, part of the steering housing made of aluminum as the inner part 10 is surrounded by an axle support made of steel as the outer part 12; A screw 16 and a nut 28 with a washer 30 in the hole 14 in the center and the two holes 11 , 13 in the outer part 12 realize the screw connection. The screw head-side hole 11 and the screw head-side part 15 of the hole 14 have an enlarged diameter.

[0028] In this case, the screw connection according to the invention is constructed in such a way that it simultaneously produces a low-resistance electrical contact between the components 10 and 12, even if they are painted, coated or covered with aluminum oxide passivation The same is true for layers.

[0029] In this case, the screw 16 has a conventional screw head 18 with a hexagonal force application...

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PUM

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Abstract

An electrically conductive screw connection between two parts (10, 12) which are screwed to one another by means of a screw (16) with a screw head (18) and with a shank (22) with an external thread (24) and by means of a nut (28), wherein the screw (16) runs through a bore (14) in one part (10), wherein the electrical contact between the other part (12) and the screw (16) is produced by teeth (27) on the workpiece-side surface of the screw head (18) and / or of the nut (28) or of a washer (30) arranged between the nut (28) and the other part (12), whereas the contact between the screw (16) and one part (10) is produced by a bushing (34; 34') which is formed so as to be radially elastic and which is arranged coaxially with respect to the shank (22) of the screw (16) in a portion (15) of the bore (14) with an enlarged inner diameter.

Description

technical field [0001] The present invention relates to an electrically conductive screw connection between two parts fastened together with a screw having a screw head and a shank, wherein the screw passes through a hole in one part. The invention also relates to special bushings for such screw connections. Background technique [0002] Since modern cars are increasingly equipped with highly sensitive electronics, all conductive parts, ie almost all metal parts of the car, need to be connected to ground and thus conduct electricity with low resistance. [0003] In the past, an additional large ground cable or other device was provided for this purpose. This always leads to the need to install additional components, involving additional costs and additional weight, which usually do not satisfactorily realize their function. For example, today the automotive industry requires grounding with two cables, each with a diameter of ten millimeters, for steering gears made of alu...

Claims

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Application Information

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IPC IPC(8): F16B5/02
CPCH01R4/304H01R4/34H01R2201/26H01R4/64F16B2001/0064F16B19/02H01R13/11F16B41/002F16B2200/93H01R4/30F16B5/02
Inventor 托尔斯特恩·施瑞尔沃尔夫冈·吉劳德
Owner RUIA GLOBAL FASTENERS AG