Device for supporting a switch rail

Abstract

The invention relates to supporting a switch rail of a switch having a projecting leaf spring which can be pretensioned to the switch rail and on which the switch rail is displaceably arranged. Low friction and easy adaptation to the mounting position is possible in that the leaf spring is adjustably arranged in its longitudinal direction in a guide body which can be fastened to the stock rail.

Claims

1. A device for supporting a switch rail of a switch, the device comprising: a projecting leaf spring configured and arranged to be pretensioned to the switch rail, and on which the switch rail is displaceably arranged; and a guide body configured and arranged to be fastened to a stock rail, the guide body including a slide attached to be adjustable along a longitudinal direction of the guide body and further attached to a first end of the projecting leaf spring, and a rolling element arranged on a second end of the projecting leaf spring opposite the slide.

2. The device of claim 1, wherein the projecting leaf spring is positioned partly within the guide body.

3. The device of claim 1, characterized in that the slide is fastened to the guide body via a frictional connection.

4. The device of claim 1, characterized in that the slide is fastened to the guide body via a connection, the connection including a surface, a surface structure, and a counter-surface of lesser hardness than the surface.

5. The device of claim 4, wherein the surface structure is flat, and the surface is configured and arranged to be impressed into the counter-surface in response to the fastening of the slide to the guide body.

6. The device of claim 4, wherein the surface structure is uneven, and the surface is configured and arranged to be impressed into the counter-surface in response to the fastening of the slide to the guide body.

7. The device of claim 1, characterized in that the slide is fastened to the guide body via a positive connection.

8. The device of claim 7, wherein the positive connection is a screw connection arranged on the side wall of the guide body.

9. The device of claim 1, further including a clamp body fastened by means of clamps to a foot of the stock rail.

10. The device of claim 9, characterized in that at least one of the clamps is connected to the clamp body at different positions.

11. The device of claim 9, characterized in that the clamp body is connected to the guide body in different positions.

12. The device of claim 1, characterized in that the guide body has a rectangular cross-section.

13. The device of claim 1, characterized in that a side of the leaf spring facing away from the stock rail has a distance (A) from a web part of the guide body facing the stock rail.

14. The device of claim 1, characterized in that the rolling element is configured and arranged to be fastened to the leaf spring so as to be height-adjustable via a roller block.

15. The device of claim 14, characterized in that the roller block is configured and arranged on the leaf spring so as to be pivotable about a vertical axis of the roller block.

16. The device of claim 14, wherein the rolling element is_one rolling element arranged on the roller block.

17. The device of claim 14, wherein the rolling element is two rolling elements.

18. The device of claim 17, wherein the two rolling elements are configured and arranged on the roller block with parallel axes.

19. The device of claim 14, wherein the rolling element is configured and arranged to be height-adjustable on the roller block via at least one screw.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, an embodiment example of the invention is explained in more detail using the figures, wherein:

(2) FIG. 1a shows a device according to the invention in a side view in a position abutting the stock rail;

(3) FIG. 1b shows the device in an oblique elevated view in a position abutting the stock rail;

(4) FIG. 2a shows the device in a side view in a position remote from the stock rail;

(5) FIG. 2b shows the device in an oblique elevated view in a position remote from the stock rail;

(6) FIG. 3a shows a device according to the invention at another point of the switch in a side view in a position abutting the stock rail;

(7) FIG. 3b shows the device in an oblique elevated view in a position abutting the stock rail;

(8) FIG. 4a shows the device in a side view in a position remote from the stock rail;

(9) FIG. 4b shows the device in an oblique elevated view in a position remote from the stock rail;

(10) FIG. 5 shows the slide with leaf spring in a side view;

(11) FIG. 6 shows the slide with leaf spring in a plan view;

(12) FIG. 7 shows the slide with leaf spring in an oblique elevated view;

(13) FIG. 8 shows the guide body in a side view;

(14) FIG. 9 shows the guide body in a plan view; and

(15) FIG. 10 shows a roller block with rolling elements of another device according to the invention with two rolling elements in a side view.

DETAILED DESCRIPTION

(16) A guide body 1 is attached to a stock rail 3 via a clamp body 15 of a device according to the invention by means of clamps 2a, 2b. The guide body 1 is formed box-like in a U-shape and firmly connected to clamps 2a, 2b via a clamp body, wherein a rigid clamp 2a and a screw clamp 2b are provided. The rigid clamp 2a is arranged on the clamp body 15 to which a screw clamp 2b is screwed. The guide body 1 is screwed to the clamp body 15. Several holes are provided in both the clamp body 15 and the guide body 1 to allow mounting in various positions along a longitudinal axis of the guide body 1.

(17) In the guide body 1 there is a slide 4, which in turn can be moved and fastened longitudinally within the guide body 1. For this purpose, there are elongated holes 12 on one side wall of the guide body 1 to fix the slide 4 with a screw 13. A rack 5 is provided on the inner wall of the guide body 1 to lock the position of the slide 4. Rack pieces 6 engaging in the rack 5 are arranged on the side of the slide 4.

(18) The relative position of the clamp body 15 to the slide 4 can thus be roughly defined by means of the connection between clamp body 15 and guide body 1. Fine adjustment is possible via the connection between guide body 1 and slide 4.

(19) Both the distance between stock rail 3 and a switch rail 11, as well as the tongue stroke of the switch rail 11 is different depending on the position of the bearing within the switch. Close to the root of the tongue, the movement range of the switch rail 11 is small and the distance from the stock rail 3 is large. Such a configuration can be seen in FIGS. 3a and 3b, as well as FIGS. 4a and 4b. FIGS. 3a and 3b show the switch rail 11 in a position abutting the stock rail 3. FIGS. 4a and 4b show the switch rail 11 in a position remote from the stock rail 3.

(20) Over the entire length of the tongue, the distance between the middle plane of the stock rail and the edge of the tongue foot (contact with the roller) varies depending on the type of switch.

(21) In the direction of the tip of the tongue of the switch rail 11, the stroke of the tongue increases. A device according to the invention in an area closer to the tip of the tongue is shown in FIGS. 1a, b in the position abutting the stock rail 3 and FIGS. 2a, b in the position remote from the stock rail 3.

(22) One end of a leaf spring 8 is attached to slide 4. The surface of the guide body facing away from the stock rail 3 is held at a distance A by the slide 4. This is dimensioned so that the leaf spring 8 does not rest on the guide body 1 even under maximum load. Thus the effective length of the leaf spring 8, and thus the spring characteristics, remains constant.

(23) Another end of the leaf spring 8 is connected to a rolling element 10 via a roller block 9 and set screws 17. The foot of the switch rail 11 rests on this.

(24) The roller block 9 is connected to the leaf spring 8 by a vertical locating pin 16, which allows slight rotation about its axis, so that the rolling elements 10 are aligned at the correct angle to the contact surface of the switch rail 11 even with tolerances of the rolling elements 10.

(25) For optimum adjustment, adjusting screws 17 are also arranged in the roller block 9, with which the rolling element 10 can be adjusted in height. This allows the pretension of the switch rail 11 to be adapted to the requirements.

(26) Due to the pretension of the leaf spring 8, the switch rail 11 is lifted by a slide chair 14 at a very early stage of the movement. This means that when the switch is adjusted, only the lower rolling friction of the rolling elements 10 has to be overcome, but not the sliding friction of the slide chairs.

(27) When a train passes over, the switch rail 11 rests on the slide chair 14, which transmits most of the load force with the exception of the pretension force.

(28) When mounting the system, the approximately required rolling element position is initially set via the clamp body 15—guide body 1 connection. This can be done at the factory in the form of product variants consisting of the same parts, or at the construction site at the beginning of assembly. Next, the entire device is clamped to the stock rail 3 using clamps 2a, 2b. Now the slide 4 is fine-adjusted in guide body 1, and thus also the position of the rolling element 10 to the stock rail 3. The position of the slide 4 is fixed with the screw 13. The rack 5 and the rack pieces 6 prevent an adjustment, for example by vibration. Finally, the entire system is pretensioned against the switch rail 11.

(29) FIG. 10 shows an alternative embodiment with two rollers. This can be used, for example, if the tongue stroke is greater than the width of the foot of the switch rail plus the roll-up distance.