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Bolt connecting and fastening device for third-rail train current collectors and slide plates

A technology for connecting fastening and current collectors, applied in the direction of threaded fasteners, bolts, connecting components, etc., can solve problems such as vibration, easy loosening of bolts, separation of slide plates and current collectors, etc., to prevent loosening and avoid The effect of excessive stress concentration and improving the ability of anti-vibration and anti-loosening

Inactive Publication Date: 2018-12-28
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the train is running, the current receiver and the contact rail will continue to vibrate during the working process, and the conventional bolts are very easy to loosen, resulting in the separation of the slide plate and the current receiver.

Method used

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  • Bolt connecting and fastening device for third-rail train current collectors and slide plates
  • Bolt connecting and fastening device for third-rail train current collectors and slide plates
  • Bolt connecting and fastening device for third-rail train current collectors and slide plates

Examples

Experimental program
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Effect test

Embodiment 1

[0019] see Figures 1 to 3 In this embodiment, a connection and fastening device between a train collector and a slide plate includes a bolt and a slide bar, wherein the bolt includes a nut 6, a polished rod 1 and a threaded rod 7, and the diameter of the polished rod 1 in the prior art is usually equal to The thread diameters are the same, although the polished rod 1 has high rigidity, the anti-seismic effect is poor, and the bolts and nuts 5 are very easy to loosen in a high-frequency vibration environment. In this embodiment, the diameter of the polished rod 1 is d0, and the thread diameter of the threaded rod 7 is d1, so that d0=0.8d1, that is, the polished rod 1 is one-fifth smaller than the thread diameter. This proportional relationship is to realize the connection and fastening device The best ratio of shock resistance and rigidity. Simultaneously, transition fillets 3 are provided at the joints between polished rod 1 and nut 6 and threaded rod 7, and the radius of tr...

Embodiment 2

[0022] The main technical solution of this embodiment is basically the same as that of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here. In this embodiment, the radius of the transition fillet 3 at the connection between the polished rod 1 and the threaded rod 7 is r2, where r2=0.2×p, where p is the pitch of the threaded rod 7 .

Embodiment 3

[0024] The main technical solution of this embodiment is basically the same as that of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here. In this embodiment, the radius of the transition fillet 3 at the connection between the polished rod 1 and the threaded rod 7 is r2, where r2=0.22×p, where p is the pitch of the threaded rod 7 .

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Abstract

The invention relates to a bolt connecting and fastening device for third-rail train current collectors and slide plates. Compared with the prior art, the bolt connecting and fastening device has theadvantages that the diameter of a polished rod of a bolt of the bolt connecting and fastening device is smaller than the diameters of threads, a long and thin hole is formed inside the polished rod along the direction of the central axis, a conical hole is formed in the tail end of a threaded rod and is used with a nut, accordingly, uniform load can be applied to joints of connecting threads of the bolt, nut threads under the maximum stress can be prevented from being damaged by vibration fatigue, and the integral anti-vibration and looseness prevention capability of connection can be improved; bolt and nut loosening conditions can be effectively reduced, and accordingly the current collectors and the slide plates can be fastened and connected with one another even under vibration conditions.

Description

technical field [0001] The invention relates to the technical field of mechanical connection and fixing, in particular to a bolt connection and fastening device for a current collector of a third rail train and a sliding plate. Background technique [0002] The current collector is the power receiving device that connects the train to the subway contact rail (third rail), and is usually installed under the doors on both sides of the train. The sliding plate of the current collector is the part directly in contact with the contact rail. In the prior art, the sliding plate and the main body of the current collector are connected and fixed by conventional standard bolts. However, when the train is running, the current collector and the contact rail will continue to vibrate during the working process, and the conventional bolts are very easy to loosen, resulting in the separation of the slide plate and the current collector. [0003] Therefore, in view of the existing problems ...

Claims

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Application Information

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IPC IPC(8): F16B35/04F16B37/00F16B39/282
CPCF16B35/041F16B35/044F16B37/00F16B39/282
Inventor 姚齐水袁秋炜余江鸿
Owner HUNAN UNIV OF TECH
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