CN103556884A

CN103556884A - Skirt board lock facilitating looseness judgment by visual inspection

Info

Publication number: CN103556884A
Application number: CN201310509168.0A
Authority: CN
Inventors: 于庆斌; 何玲利; 安忠亮; 杨延生
Original assignee: Changchun Railway Vehicles Co Ltd
Current assignee: CRRC Changchun Railway Vehicles Co Ltd
Priority date: 2013-10-25
Filing date: 2013-10-25
Publication date: 2014-02-05

Abstract

A skirt board lock facilitating looseness judgment by visual inspection comprises a lock sleeve, a lock cylinder, a lock washer and a nut. The skirt board lock is characterized in that the outer portion of the lock cylinder is connected with an inner barrel, the inner barrel and the lock cylinder are integrated, a boss is arranged at the right end of the inner barrel, the root of the boss is sleeved with a seal ring, a check ring is arranged at the position of a lock body of the lock cylinder, a step is arranged on the inner side of the right end of the lock sleeve and matched with the check ring installed at the position of the lock body of the lock cylinder to prevent the lock cylinder from being dropped on the lock sleeve, and an arc-shaped gasket is arranged at the inner root of the left side of the lock sleeve and used for ejecting the lock cylinder out of the lock sleeve. When the lock cylinder is fastened, the surface of the end of the skirt board lock cylinder is flush with the outer surface of the lock sleeve; when the lock cylinder is loosened, the internal arc-shaped gasket ejects the lock cylinder out of the lock sleeve, the effect of judging whether the skirt board lock is loosened can be judged by visual inspection, the anti-loosening and tightening torque applying requirements of all motor train unit skirt board locks can be met, and no special tool is needed for sealing and lock cylinder replacement simultaneously.

Description

Be convenient to the loosening apron board lock of range estimation judgement

Technical field

The present invention relates to a kind of apron board lock, especially relate to the judgement of can estimating of using on a kind of bullet train and lock the novel apron board lock whether becoming flexible.

Background technology

Most of key equipment of bullet train is lifted under car, when train can produce very strong air pressure wave and very large air resistance during high-speed cruising on the line, and the situation that stone, ice cube or other object and high-speed train are divided into standby meet accident high velocity impact and strike occurs often.For reducing air resistance, equipment under protection and tool car, guarantees the safe operation of EMU, and the car following side of the EMU of Speed 200 km/h and above speed class arranges the sidepiece skirtboard that possesses water conservancy diversion, protection, maintenance function.

In order to guarantee conventional maintenance and the maintenance of equipment under car, skirtboard need to often be unlocked, and therefore will guarantee that skirtboard switch is convenient, fast.So sidepiece skirtboard does not adopt being fixedly connected with of bolt with car body connected mode, and adopt screw fastening structure.Because skirtboard needs often to open, latch mechanism can not be realized locking by the mode that applies moment stroke locking mark.If apron board lock occurs loosening in train high-speed cruising process, cause skirtboard to come off, will seriously jeopardize the security of operation of train.Existing apron board lock is comprised of lock tube, lock core, back-up ring, lock washer and hex nut etc., first between apron board lock and skirtboard, install is that lock core is put into lock tube, then end back-up ring is installed, prevent that lock core from deviating from lock tube, lock core is put into the installing hole that skirtboard is corresponding with lock tube combination, and it is fixed to use lock washer and hex nut.After apron board lock is fastening, cannot estimates judgement lock and whether become flexible; Apron board lock, when fastening, also cannot judge whether Tightening moment reaches required value; And apron board lock self blow-by, easily intake into dirt, affect the normal locking of apron board lock; When lock core is changed, need tool using after back-up ring taking-up, just can change.

Summary of the invention

Technical problem to be solved by this invention is that apron board lock cannot estimate to judge whether loosening problem and apron board lock cannot judge when fastening whether Tightening moment reaches the problem of required value, and guaranteeing sealing and changing lock core does not need special tool(s).

For solving the problems of the technologies described above, the invention provides a kind of loosening apron board lock of range estimation judgement of being convenient to, comprise lock tube, lock core, lock washer, nut, it is characterized in that: lock core connects an inner core outward and lock core is integrated, inner core right part arranges a boss, boss root is inserted in sealing ring, the lock body place of lock core arranges a back-up ring, inner side, lock tube right part arranges a step, the back-up ring of installing with the lock body place of lock core coordinates, prevent that lock core from coming off in lock tube, in lock tube left side, root arranges a curved washer, for lock core is ejected to lock tube.

When the present invention is fastening, skirtboard lock core end surface and lock tube external surface one are flat, when lock core is loosening, inner curved washer ejects lock tube by lock core, reach range estimation and can judge the effect whether apron board lock is loosening, can meet locking, the demand that applies Tightening moment of all EMUs apron board locks, guaranteeing sealing simultaneously and changing lock core does not need special tool(s).

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

The specific embodiment

With reference to Fig. 1, the present invention includes lock tube 1, sealing ring 2, lock core 3, polytetrafluoro back-up ring 4, curved washer 5, lock washer 6, nut 7, outer connection one inner core of lock core 3 and lock core are integrated, inner core end outer surface is treated to conspicuous color, inner core right part arranges a boss, boss root is inserted in sealing ring 2, sealing ring color and interior tube outer surface solid colour, the lock body place of lock core arranges a polytetrafluoro back-up ring 4, lock tube 1 inner side, right part arranges a step, the polytetrafluoro back-up ring of installing with the lock body place of lock core coordinates, prevent that lock core from coming off in lock tube, in lock tube left side, root arranges a curved washer 5, for lock core is ejected to lock tube.Lock core enters lock tube inside by extruding polytetrafluoro back-up ring, and back-up ring and lock tube step prevent that lock core from deviating from lock tube without external force in the situation that.

Apron board lock, when fastening, is fastened to lock core inner core end and lock tube end one is flat, and the now sealing ring of lock core and the extruding of lock tube inner side guarantees the sealing performance of apron board lock.Adjust the rigidity of curved washer, can be to guaranteeing that the moment values that lock core end and lock tube end one apply when flat controls, assurance moment values can meet the fastening requirement of apron board lock.When if lock core becomes flexible, the curved washer of lock tube inner end is released lock tube by lock core, exposes the end that is marked with conspicuous color, now can estimate judgement lock and become flexible.

Claims

1. be convenient to the loosening apron board lock of range estimation judgement for one kind, comprise lock tube, lock core, lock washer, nut, it is characterized in that: lock core connects an inner core outward and lock core is integrated, inner core right part arranges a boss, and boss root is inserted in sealing ring, the lock body place of lock core arranges a back-up ring, inner side, lock tube right part arranges a step, and the back-up ring of installing with the lock body place of lock core coordinates, and prevents that lock core from coming off in lock tube, in lock tube left side, root arranges a curved washer, for lock core is ejected to lock tube.