PL164324B1 - Operating essembly for railway switches - Google Patents

Abstract

Points mechanism, in which the points blades are fixed in the limit positions by means of monitoring rods, and the power transmission from the drive unit to the connecting rods (1) takes place by means of a roller (3) which engages in a frictionally locking manner in a recess (2), the roller being guided in a housing (4) arranged slidably on the connecting rods and being pressed into the recess by a locking bolt. The locking bolt (5) is locked at its end facing away from the roller (3) by means of a rigid locking device (8 and 9) fixed to the housing (4), which device contains a threaded plate (9) which can be screwed into the housing (4) and has a bore (13) which is concentric with respect to the bolt (5) and whose diameter is larger than the external diameter of the bolt (5), and a shearing disc (8) which is clamped in between the bolt (5) and the threaded plate (9) and has predetermined resistance to fracture. <IMAGE>

Description

The subject of the invention is a switch drive for railway installations Switch drives of this type are known, for example, from DE-AS 19 52 824 and DE-AS 26 06 664. Due to the fact that the locking screw is pressed against the roller by means of a spring, preferably a plate compressor, the roller forms a resilient connection with the plow / fig. 1 /.

Due to this elastic connection, the switch tapers. The impinging on a switch in the tapering direction causes a force on said non-adherent adjustment bar which outweighs the fixing force of the elastic connection and moves the pusher to a different rest position / Fig. 2 /. As the housing is seated in the transmission via a rocker, the pusher, acting against the force of the spring, forces the roller out of its seat, thereby unlocking the connection. The spring force is regulated by the threaded disc.

However, in many applications a convergent crossover is not needed. Manufacturers and users alike want to be able to change switches easily from a face-to-face to a counter-rotating device.

DE-AS 19 52 824 proposes that - in counter-rotating applications - the spring and the roller should be replaced by a bolt of suitable construction, rigidly connected to the spring housing, as a result of which the elastic connection between the popper and the spring housing is replaced by a form fit. The disadvantage of such a solution in the case of adapting one type of switch to another is the need to replace the entire spring housing.

In the patent description OE-AS 26 06 664 two other solutions are proposed. One of them uses bolts that enter the holes in the pushers. In the tapered version, the holes have bevelled edges, so that the bolts are fully raised when running over the switch in the converging direction. In the counter-rotating version, the edges of the holes in the pushers are only partially chamfered. If the bolt reaches the end of the hole only partially seated, then

Its further movement is not possible and the drive is blocked with bolts. This solution also has the disadvantage that it requires the alignment of two different pushers, which must be taken into account in their production process.

The latter design uses a screw that can be adjusted to limit the upward movement of the roller. Thanks to this solution, the elastic connection is kept, the bolt is not fully extended and the entire drive remains blocked. This solution also has the disadvantage that the change of the switch from the converging to the counter rotating switch takes place at a location that is difficult to access.

The object of the present invention is to improve the known switch drive in such a way that the change from the converging switch to the counter-rotating switch can be made without difficulty and in an easily accessible place.

A further disadvantage of all known solutions is that the result of a run-over of the converging switch is either derailment or destruction of the switch drive or the switch itself.

Therefore, the object of the present invention is to improve the counter-rotating switch drives in such a way that in the event of a converging convergence, the damage is relatively small, and the damaged components can be replaced in a simple manner and in easily accessible places.

The switch drive for railway installations according to the invention consists in the fact that the end of the locking bolt, not in contact with the roller, is locked with a rigid bolt consisting of a threaded disk and a disk embedded in the housing.

The part of the bolt located in the upper end of the casing is easily accessible and, if necessary, it can be very easily replaced with a pre-tensioned spring, thanks to the fact that the switch tapers.

The bolt consisting of a threaded disk and a disk has a deliberately weakened space in the disk.

Preferably, the bolt consists of a threaded disk which can be screwed into the housing by means of a hole which is concentric with the bolt and the diameter of this hole is greater than the outside diameter of the bolt and a disk of intentionally weakened structure. The disc is placed between the screw and the threaded disc, which is secured against unscrewing by a screw. This prevents the possibility of unintentionally unscrewing it, thereby creating an undefined distance between the bolt and the disc. The security bolt is preferably sealed to prevent deliberate loosening of the threaded disk or replacement of the disk.

When hovering in the converging direction, the screw pierces the disc. It can be easily replaced by unscrewing the threaded disk. The adjustment of the mechanical strength, and therefore the unlocking force, is achieved by using disks of different strengths and / or of different materials. The adaptation of the switch drive to the concurrent operation is made in a simple way by removing the rigid bolt and inserting the spring between the bolt and the disc).

The subject of the invention is illustrated in exemplary embodiments in the drawing in which Fig.

shows the resilient connection of the pusher and housing in the previous solutions, fig.

the same device after the collision unlocking, Fig. 3 - an improved device according to the invention, and Fig. 4 - the same device in the converging state.

Fig. 1 shows a known structure of the elastic connection between the pusher 1 and the spring housing 4, consisting of a roller 3 pressed into the seat 2 by a screw 5. The spring 6 exerts a pressure on the screw 5, the size of which can be adjusted by means of a threaded hoop 7.

In the converging state, as shown in Fig. 2, the pusher 1 is brought into its second rest position due to a force exerted on it by non-adjacent switch cuts, not shown in the drawing. As a result, the force of the spring 6 acting on the roller 3 is overcome and the roller slides out of the seat. This situation can be cleared only by relocating the switch, which will push the pusher into slot 2 again.

Fig. 3 shows a device according to the invention, in which the spring has been replaced by a bolt consisting of a threaded disk 9 and a disk 9. The screw 5 must not move.

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It is secured by a disk 8 and a threaded disk 9 which is screwed into the housing. The second threaded disk 7 serves only as a guide and may be screwed into any position of the thread. The threaded disk is secured against unscrewing by a locking screw 11. The end of the housing is covered with a protective cap 10, which is also secured by screws; 11. The hole 12 in the screw 11 makes it possible to adjust the quantity and thus protect the device against unauthorized access. It is advantageous to use two securing bolts arranged at right angles to each other, which enables them to be sealed together with one seal.

Figure 4 shows the device according to the invention in a converging state. As already explained in connection with the description of Fig. 1, the pusher is pulled to the left. As a result, the roller rises upwards from the seat and presses against the bolt 5. The bolt 5, in turn, pierces the disk 8, which unlocks the elastic connection. As there is no pre-tensioned spring to restore the previous situation, the device can only be reactivated by removing the protective cap 10, unscrewing the threaded disk 9, replacing the worn disk 8 with a new one and reassembling the threaded disk 9.

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Publishing Department of the UP RP. Circulation of 90 copies. Price: PLN 10,000

Claims (5)

Patent claims 1. Switch drive for railway installations, consisting of setting rods locked in their rest positions by control rods, in which the power transmission from the actuator to the pusher is carried out by means of a roller connected elastically with the socket, thanks to which it is guided in a housing seated on in relation to the pusher and pressed against the socket by means of a bolt, characterized in that the end of the locking bolt / 5 / not in contact with the roller / 3 / is locked by a rigid bolt consisting of a threaded disk / 9 / and a disk / 8 / embedded in the housing / 4 /. 2. Switch drive according to the guidelines. A device as claimed in claim 1, characterized in that the bolt consisting of a threaded disk / 9 / and a disk / 8 / has a place in the shape of the disk with a deliberately weakened structure. 3. Eddlong aastrz point drive. 2, characterized by Cym, cg, ee and consists of a threaded disk / 9 /, which can be screwed into the housing / 4 / by means of a hole / 13 / which is concentric with the screw, the hole diameter / 13 / being larger than the outer diameter of the bolt / 5 /, and the disk / 8 / with a deliberately weakened structure, placed between the bolt / 5 / and the threaded disk / 9 /. 4. Switch point drive withst. 3, znameanny Cym, ey ngwwi ^ tc ^^ ana trrcza / 9 / is secured against unscrewing by means of a securing screw / 11 /. 5. A switch drive according to claim 4. The method of claim 4, characterized in that the screw / 11 / is sealed.