CN1650070A - Railway rail fastening clip - Google Patents

Abstract

The clip (9) comprises firstly a substantially straight first portion (1), then a bent second portion (2), then a substantially straight third portion (3) the axis of which makes an angle substantially more than 45{ with the axis of the first portion (1), the two axes lying in the same plane as one another, then a fourth portion (4) which is a reverse bend, then a fifth portion (5), then a sixth portion (6) which is another reverse bend and finally a seventh portion (7), the first portion (1) being formed so as to comprise a region (1B) having a generally cylindrical surface extending along its entire length and a longitudinally-extending part (1A) having a surface which is less convex, e.g flat or concave, than the surface region (1B). At least part of the second portion (2) and at least part of the third portion (3) are preferably manufactured with substantially flat surfaces (2A, 3A) on respective lateral regions thereof which contact the rail when the clip (9) is in use.

Description

Railway rail fastening clips

technical field

The invention relates to a railway rail fastening clip.

Background technique

In GB 2199875B, the disclosure of which is incorporated herein by reference. In this application, the applicant discloses a resilient railway rail fastening clip 90, as shown in Figures 1 and 2 of the accompanying drawings. The fastening clip 90 is made of a metal rod that is bent such that it goes from one end to the other along the metal rod, first having a substantially straight first portion 10; then a curved second portion 10. part 20; then a substantially straight third part 30, the axis of said third part 30 forming an angle substantially greater than 45° with the axis of first part 10, said two axes lying in the same plane; and is a fourth portion 40 bent in the opposite direction; then a fifth portion 50; then another sixth portion 60 bent in the opposite direction; and finally a seventh portion 70 forming a fastening clip 90's toe. The fifth portion 50 and the seventh portion 70 appear to be on opposite sides of the third portion 30 when viewed from above.

In use, the fastening clip 90 is placed on a sleeper 100 and the seventh part 70 is placed on the foot 120 of a rail 110, the first part 10 extends into a circular blind hole 140 of the sleeper 100, and a helical The spike 130 is inserted into the sleeper 100 between the third portion 30 and the fifth portion 50 . In this way the fastening clip 90 is held in place where the toe 70 of the fastening clip 90 presses against the rail foot 120 so as to compress the rail 110 and the The lateral parts of the second part 20 and the third part 30 contact the edge of the rail foot 120 in order to ensure that the gauge remains constant, ie to prevent the rail 110 from moving sideways.

Applicants have now recognized that improvements can be made to this fastening clip 90 .

The hole 140 in the sleeper 100 into which the first part 10 is inserted must be drilled slightly larger than the diameter of the first part 10 (for example, to accommodate a first part 10 with a diameter of 14 mm at a diameter of 15 mm) in order to avoid the so-called "pneumatic effect". )", the above-mentioned "air pressure effect" may cause difficulties when making the first part 10 enter the blind hole 140 and when removing the first part 10 of the fastening clip 90 from the hole 140 during the rollway stress relief operation. However, it is desirable for the first part 10 to fit relatively tightly in the hole 140 in order to control the lateral movement of the rail footing 120 .

Contents of the invention

According to one embodiment of the present invention, there is provided a resilient railway rail fastening clip, the fastening clip is a metal rod bent such that along the metal rod from one end to the other end there is firstly a A substantially straight first portion; then a curved second portion; then a substantially straight third portion, the axis of which forms an angle substantially greater than 45° with the straight line of the first portion , the above two axes lie in the same plane; then a fourth part bent in the opposite direction; then a fifth part; then another sixth part bent in the opposite direction; finally a seventh part; such a structure The form enables the fastening clip to be placed in a specific position so that the third part is horizontal and the first part extends downwards, and when viewed from above, the fifth and seventh parts appear to be on opposite sides of the third part. On the other hand, the fastening clip is characterized in that the first portion is shaped to include a region having a substantially cylindrical surface extending along its entire length and a longitudinally extending portion having a substantially larger diameter than the first portion. A surface that is less convex than a cylindrical surface.

Producing the first part of the fastening clip in this way eliminates air pressure resistance and makes it easier to insert and remove the first part of the fastening clip into and out of a blind hole of the sleeper.

Preferably, the surface of the longitudinally extending portion is substantially flat.

Alternatively, the surface of the longitudinally extending portion is concave.

Typically, the bars forming the fastening clip have a substantially circular cross-section. When pressed against the edge of the rail to prevent sideways movement of the rail, the second and third parts of the prior art fastening clip therefore only make line contact with the flat edge of the rail, with the result high contact pressure and premature wear , while forming a flat portion in these areas on the fastening clip and thus causing some slight gauge widening.

Therefore, it is preferred that, in applying a fastening clip according to the invention, at least a part of the second part and at least a part of the third part are made such that, on their respective lateral areas, there is a A substantially flat surface that comes into contact with a rail.

Consequently, the contact pressure between the flat surfaces of the second and third portions of the clamp and the edge of the rail is much lower, considerably reducing wear on these areas of the clamp.

Ideally, the substantially planar surface of the second part joins the substantially planar surface of the third part.

When the longitudinally extending portion of the first part has a substantially planar surface, this surface is preferably joined to the substantially planar surface of the second part.

Description of drawings

By way of example, reference will now be made to the accompanying drawings, in which:

Figures 1 and 2 (described above) illustrate a prior art railway rail fastening assembly;

Figures 3 to 7 show perspective, top, side, front and rear views of a resilient railway rail fastening clip embodying the present invention;

Figure 8 shows a partially cutaway perspective view of a portion of a railroad track fastening assembly including a fastening clip embodying the present invention;

9(A)-FIG. 9(D) are views for explaining a method of manufacturing a fastening clip embodying the present invention; and

Figure 10 shows another alternative fastening clip embodying the invention.

Detailed ways

As shown in FIGS. 3 to 9, a railway rail fastening clip 9 embodying the present invention is made of a metal rod comprising a substantially straight A first part 1, a curved second part 2, a substantially straight third part 3, a curved fourth part 4, a fifth part 5, a curved sixth part 6 and a fastening Clip 9 the seventh part 7 of the toe. The longitudinal axes of the first part 1 and the third part 3 lie in the same plane, the axis of the third part 3 forming an angle with the axis of the first part 1 . In this embodiment the angle α is shown as 90°, but α may be substantially any angle greater than 45°.

As in the prior art, the fastening clip 9 is held such that the toe of the fastening clip is pressed against the rail foot 12 by a spiral spike 13 screwed into the crossties 15, the nails of which are The head is pressed against the third part 3 and the fifth part 5 of the fastening clip.

The fastening clip 9 is manufactured in such a way that on the first part 1 is formed a region having a generally cylindrical surface 1B extending along its entire length and a longitudinally extending portion 1A having a larger than generally cylindrical surface 1B. Shaped surface area 1B is the less convex surface. In this embodiment, the longitudinal extension comprises a plane 1A. The fastening clip 9 is also produced in this embodiment with a flat surface 2A on the second part 2 and a flat surface 3A on the third part 3, the flat surfaces 2A and 3A being located between the second part 2 and the third part 3 On the side areas of the respective edges that contact the rail footing 12 . For ease of manufacture, plane 1A is connected to plane 2A, which in turn is connected to plane 3A. But this is not required.

The plane 1A on the first part 1 is used to avoid the air pressure resistance that will occur when the first part 1 is inserted into a blind hole 14 of the same diameter in the crossties 15 rather than slightly larger, thereby enabling the first part 1 to be more compact in the hole 14 The rail foot 12 is therefore prevented from moving laterally. As shown in Fig. 10, the plane 1A can be replaced by a groove 1C formed in the first part 1 in order to achieve the same purpose, but for ease of manufacture it is preferred that the fastening clip is desired to be on the same side as the planes 2A, 3A There is a plane 1A on it.

The preformed flats 2A, 3A on the second part 2 and third part 3 of the fastening clip 9 are used to prevent widening of the gauge otherwise if the cross-section of these parts is circular and a flat is ground on these areas, then Gauge widening occurs in these areas. These preformed flats can also advantageously be adapted for rail clamps which do not have a flat or groove on their downward legs.

A fastening clip 9 having planes 1A, 2A and 3A can be produced by the method shown in FIGS. 9(A) to 9(D). In FIG. 9(A), a pre-bent shape is supported horizontally, and planes 1A, 2A, and 3A are formed by being extruded in the arrow A direction. The fastening clip (Fig. 9(B)) of the vertical support part molding is then, and a force is applied to the part to be formed into the seventh part 7 along the direction of arrow B (Fig. 9(C)), so that the part is bent to its final shape, thus forming a fastening clip embodying the invention (Fig. 9(D)).

As shown in Figure 4 to Figure 7 in the accompanying drawings, the size of a typical fastening clip implementing the present invention is as follows: l=143mm, w=76mm, a=75mm, b=97mm, c=46mm, d=14mm , e=30mm, f=45mm, g=13mm, r1=8mm, r2=12.5mm and α=90°.

Claims (7)

1. An elastic railway rail fastening clip (9) which is a metal rod which is bent such that along the rod from one end to the other it first has a substantially is a straight first section (1); then a curved second section (2); then a substantially straight third section (3), the axis of which is the same as that of the first section ( The axes of 1) form an angle substantially greater than 45°, the two axes lie in the same plane; then a fourth portion (4) bent in the opposite direction; then a fifth portion (5); then another a sixth part (6) bent in the opposite direction; and finally a seventh part (7) constructed in such a way that it enables the fastening clip (9) to be placed in a specific position so that the third part (3) is horizontal and the first part (1) extends downwards, and when the fastening clip (9) is viewed from above, the fifth part (5) and the seventh part (7) appear to be in the third part (3) On the opposite side, the fastening clip is characterized in that the first part (1) is formed such that it comprises a region (1B) having a substantially cylindrical surface extending along its entire length and a longitudinally extending part ( 1A; 1C), said longitudinally extending portion (1A; 1C) has a surface that is less convex than the generally cylindrical surface area (1B) of the first portion (1). 2. A fastening clip according to claim 1, characterized in that the surface of the longitudinally extending portion (1A) is substantially flat. 3. A fastening clip according to claim 1, characterized in that the surface of the longitudinally extending portion (1C) is concave. 4. A fastening clip according to any one of the preceding claims, characterized in that said rod is located except at least part (2A) of the second part (2) and at least part of the third part (3) Outside (3A), having a substantially circular cross-section, the above-mentioned second part (2) and third part (3) are manufactured such that they have A substantially flat surface (2A, 3A) that contacts the rail. 5. A fastening clip according to claim 4, characterized in that the substantially flat surface (2A) of the second part (2) is in contact with the substantially flat surface (2A) of the third part (3). 3A) are contiguous. 6. A fastening clip according to claim 4 or 5 when dependent on claim 2, characterized in that the substantially flat surface (1A) of the first part (1) is in contact with the surface (1A) of the second part (2). The substantially planar surfaces (2A) are contiguous. 7. A fastening clip according to any one of the preceding claims, characterized in that the first part (1) has no helical portion which facilitates screwing the fastening clip (9) into the sleeper.

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