CN2108741U

CN2108741U - Bottom plate with cone elliptic hole and screw bolt

Info

Publication number: CN2108741U
Application number: CN 91222578
Authority: CN
Inventors: 夏增月
Original assignee: Shenyang Engineering Affairs Apparatus And Material Factory Shenyang Railway Bu
Current assignee: Shenyang Engineering Affairs Apparatus And Material Factory Shenyang Railway Bu
Priority date: 1991-12-02
Filing date: 1991-12-02
Publication date: 1992-07-01

Abstract

The utility model relates to a bottom plate with cone elliptic holes and a screw bolt, wherein, the bottom plate can be cast by malleable cast iron; a water proof table is arranged around the screw track spike hole of each of four corners of the bottom plate, and the water proof table is used for preventing the rainwater from flowing into the screw track spike hole to erode sleepers; the lower parts of two cone elliptic holes are cones, and the upper part of the two cone elliptic holes are ellipses; spring strip fasteners, rails and the bottom plate can be firmly connected by cone elliptic head screw bolts which are matched with the cone elliptic holes, and thus the fastening force, the climbing proof ability and the stability of railway tracks can be increased. Thus the bottom plate with cone elliptic holes and the screw bolt can be corresponding to the upper structure of the rail track of the present main line, and can be suitable for the rails with the weight of 43 kg/metre, 50 kg/metre, 60 kg/metre, 75 kg/metre, having the application to the bridge and the wooden sleeper lines.

Description

Bottom plate with cone elliptic hole and screw bolt

The utility model belongs to a kind of taper elliptical aperture backing plate and bolt of having, and this backing plate and bolt can be supporting with 70 type fasteners or elastic bar fastener, adapts to every meter 43,50,60,75 kilograms of rail to use.

The most railway rail pads that do not have quarrel railway bridge railway rail pad and sleeper circuit location of China still use GB186-63 at present, GB187-63, the heavy rail tradition backing plate of special line 3181, connect rail with cut-spike, backing plate and sleeper, and the rail track superstructure has been carried out significant improvement, has generally laid long rail on main track, reinforced concrete sleeper, fastener then adopt 70 type fastener or elastic bar fasteners.Therefore still use traditional backing plate to compare with present main track with the cut-spike connecting piece on the bridge and exist poor stability, the shortcoming of tightness and anti-creep ability is suddenly waited to improve.

The purpose of this utility model is a kind of stability of design, tightness, anti-creep performance good with existing main track circuit link part corresponding to band taper elliptical aperture backing plate and bolt.

The technical measures of taking for the purpose that realizes invention are:

1, this backing plate is cast with malleable cast iron and is formed, and it is shaped as support rail platform shape.

2, four jiaos on this backing plate has the waterproof platform in screw spike hole hole week, is used to prevent that rainwater from flowing into nail hole internal corrosion sleeper.

3, the bottom of two bolts hole at this backing plate middle part is taper, and top is oval, and the bottom of supporting with it bolt head also is taper, and top also is oval, and the diameter of bolt hole of backing plate is slightly larger than the bolt head diameter.

The utility model compares with using cut-spike, backing plate connecting piece, and its advantage is that the connection of this backing plate and sleeper is to use the bond stress of screw spike and sleeper to substantially exceed the friction of cut-spike and sleeper, thereby has improved the bond strength of backing plate and sleeper; The bottom of the taper elliptical aperture of this backing plate is taper, top is oval, and the oval bolt of the taper that is used with it, this has just increased the contact surface of bolt hole and bolt head, improve the buckle press of bolt greatly, and improved stability, tightness and the anti-creep performance of bolt and elastic bar fastener, rail and backing plate connection; There is the waterproof platform in the screw spike hole hole week that this backing plate is four jiaos, can prevent that rainwater from flowing into nail hole internal corrosion sleeper.

Description of drawings:

Fig. 1 is a band taper elliptical aperture backing plate vertical view;

Fig. 2 is this backing plate B-B sectional view;

Fig. 3 is this backing plate A-A sectional view;

Fig. 4 is a taper oval head bolt front view;

Fig. 5 is a taper oval head bolt vertical view;

Fig. 6 is a taper oval head bolt lateral view.

Number in the figure: 1, backing plate; 2, screw spike hole; 3, waterproof platform; 4, taper elliptical aperture; 6, shoulder block; 6, bolt; 7, taper oval head.

Further specify the utility model embodiment below in conjunction with accompanying drawing:

Having taper elliptical aperture backing plate 1 is to cast with malleable cast iron to form, at these backing plate 1 two ends shoulder block 5 is arranged, four jiaos have screw spike hole 2, there is being waterproof platform 3 to be used to prevent that rainwater from flowing in the nail hole in these 2 hole weeks of hole, the corrosion sleeper, 2 taper elliptical apertures 4 are arranged on backing plate, and these 4 bottoms, hole are tapers, and top is oval; The top of the taper oval head 7 of bolt 6 also is taper, and the bottom also is oval, with this taper oval head bolt elastic bar fastener, rail and backing plate is connect together securely, has improved buckle press, thereby has improved the stability line of anti-creep ability and rail track.

Claims

1, a kind of band taper elliptical aperture backing plate and bolt, this backing plate 1 is a support rail platform shape, and there is shoulder block 5 at two ends, and four jiaos of this backing plate 1 have screw spike hole 2 respectively, it is characterized in that:

1) the screw spike hole 2 of 4 jiaos on this backing plate hole week waterproof platform 3 is arranged, there are 2 taper elliptical apertures 4 at the backing plate middle part, the bottom in this hole 4 is tapers, top is oval;

2) taper oval head 7 bottoms of the bolt 6 that matches with taper elliptical aperture 4 are tapers, and top is oval.