WO2015149915A1

WO2015149915A1 - Slotted disk for a safety drive controller with a modular design

Info

Publication number: WO2015149915A1
Application number: PCT/EP2015/000615
Authority: WO
Inventors: Manfred Huber
Original assignee: Schaltbau Gmbh
Priority date: 2014-04-02
Filing date: 2015-03-20
Publication date: 2015-10-08
Also published as: DE102014004844B4; DE102014004844A1

Abstract

The invention relates to a slotted disk for a safety drive controller with a modular design, in particular for a rail safety drive controller. The slotted disk has a bearing point and a receiving bore oriented substantially perpendicularly to an axis of the bearing point for supporting an actuation rod of the drive controller. According to the invention, the receiving bore is designed to support a movably mounted actuation rod of a pushbutton safety drive controller, to support a rotatably mounted actuation rod of a rotary safety drive controller, and to receive an actuation rod which is rigidly connected to the slotted disk.

Description

Sliding link for a modular safety travel switch

The present invention relates to a link plate for a modular safety travel switch. In particular, the present invention relates to a link plate for a modular train safety travel switch. Safety travel switches are preferably used in the area of the train, in order to prevent prolonged carelessness or even unconsciousness of the driver leads to fatal consequences. A safety travel switch periodically requires the operator to operate the operating lever to maintain the operation of the machinery. If the feedback or actuation of the switch by the driver, it is usually first issued a warning signal. Subsequently, the machines are switched off and brought the train to a standstill.

Different safety travel switches are known from the prior art. So-called pressure safety travel switches are designed so that the driver must press down the handle of the operating lever at regular intervals in order to maintain the operation of the machines. In the case of a so-called rotary safety travel switch, the handle of the operating lever must be turned a little bit at regular intervals. In both cases, a spring return ensures that the handle of the control lever returns to its original position. Whether a pressure safety travel switch or a rotary safety travel switch is used depends on the requirements of the railcar manufacturer.

Currently, security travel switches are predominantly designed and manufactured individually according to customer specifications. In particular, the design and manufacture of the rotatably mounted link plate of the operating lever represents a significant cost factor. A generic link disc has a bearing point and a substantially perpendicular to an axis of the bearing aligned receiving bore for mounting an actuating rod of the drive switch on. The operating rod is part of the operating lever. At her the handle of the operating lever is attached.

The object of the present invention is to reduce the expense associated with the design, manufacture and assembly of a safety drive switch made to customer specifications, and in particular to reduce costs. The object is achieved by the features of independent claim 1. Accordingly, in a generic gate plate for a modular safety travel then a solution according to the invention the task before when the receiving bore both for storage of a displaceably mounted actuating rod of a pressure-safety travel switch and for storage of a rotatably mounted actuating rod of a rotary safety drive switch as well as for receiving a fixedly connected to the link plate actuating rod is formed. Thus, in a simple manner, either a pressure safety travel switch or a rotary safety travel switch or a travel switch without safety function can be mounted using one and the same link disc. The invention facilitates the modular design of a safety travel switch or a travel switch without safety function by using standard components. The bearing point of the link plate can be, for example, a central bore for receiving a shaft piece or a central bearing projection. Advantageous embodiments of the present invention are the subject of the dependent claims.

In a particularly preferred embodiment of the present invention, the link disc on at least one of its two sides to a receiving bore leading first recess into which a torsion spring is inserted, through which a spring return of the actuating rod is effected. This embodiment allows in a simple manner the installation of an operating rod of a rotary safety drive switch. The torsion spring is preferably used so that it surrounds the actuating rod at least partially. In order to facilitate the assembly further or to provide accessibility from both sides, it can further preferably be provided that the first recess extends from the first side of the link plate up to the second side of the link plate. This embodiment facilitates in particular the onset of the torsion spring. Second, the recess can be made particularly simple in this embodiment. For example, it is possible to mill the recess out of the link disk. Furthermore, it is also conceivable to produce the link plate as a casting.

In a further particularly preferred embodiment of the present invention, the first recess between the bearing and an outer periphery of the gate Disc arranged. Preferably, the first recess is provided in the opposite of the operating handle half of the crank disk. In this embodiment, the first recess is not visible from the outside, even if the upper part of the link plate protrudes from the switch housing. It is particularly advantageous if at least one pocket for hooking in one end of the torsion spring embodied as a leg spring is formed on one edge of the first recess. In this way, no additional fastening elements are necessary for at least one end of the leg spring. In each case, a pocket for hooking in one end of the torsion spring designed as a leg spring is particularly preferably formed on two opposite edges of the first recess. As a result, depending on the customer, a change of direction of rotation by replacing or repositioning the torsion spring is possible.

In a further preferred embodiment of the present invention, the link disc on at least one of its two sides leading to the receiving bore de second recess, which is arranged at a distance from the first recess. The second recess may preferably form a stop for a circlip or the like to axially secure the actuating rod of a rotary safety travel switch.

In a further particularly preferred embodiment of the present invention, the receiving bore is designed as a stepped bore. Thereby, a fixed hollow shaft can be used in the part with a larger diameter, which surrounds and protects the actuating rod. Preferably, the hollow shaft can be locked with a laterally insertable into the link screw. For this example, a grub screw is suitable. The part of the stepped bore with a smaller diameter is preferably dimensioned in diameter so that there is a clearance fit between the actuating rod and the bore. If the safety travel switch is designed as a pressure safety travel switch, a precise sliding seat of the actuating rod is thereby realized. If the safety travel switch is a rotary safety travel switch, this results in a precisely rotatable mounting of the actuation rod. In a further preferred embodiment of the present invention, the receiving bore extends continuously through the entire link disc. As a result, the actuating rod can be used to unlock a Aufschaltsperre, which prevents the operator to turn the scenery, for example, from a middle switching position. The Aufschaltsperre is this preferably arranged on a the operating handle opposite end of the actuating rod on the outer circumference of the crank disk.

In a further particularly preferred embodiment of the present invention, at least one laterally projecting stop bolt is arranged on at least one side of the crank disk and is intended to interact with a stop of the safety travel switch in order to increase the possible range of rotation of the link disk about the axis of the bearing limit. In other words, this limits the lever deflection of the safety travel switch. This embodiment enables a particularly simple and cost-effective implementation of Hebelauslenkungsbe- grenzung. Preferably, two stop pins are provided to limit the lever deflection in both directions.

Further preferably, the link disc further fastening elements. For example, a mounting threaded hole for mounting a Aufschaltsperrenblechs be provided. The mounting threaded bore is preferably located near the outer periphery of the link plate and more preferably between the stop pin to limit the lever deflection. On the opposite side of the link plate further preferably a mounting hole for mounting a brake is provided. Further preferably, the link plate on a mounting thread for an insertable into a central bore of the link plate shaft piece.

The invention further provides a linkage arrangement for a modular safety travel switch with a link plate according to the invention. Preferably, the gate assembly comprises an actuating rod mounted in the receiving bore and a safety signal transmitter, wherein an actuating element of the safety signal transmitter is designed and positioned in such a way that it can be actuated both by a widening portion of an actuating rod (pressure safety drive switch) displaceably mounted in the receiving bore also by a cam surface section of a rotating bar mounted in the receiving bore actuating rod (rotary safety travel switch) can be actuated. This results in a particularly cost-effective and simple design of the safety drive switch. Preferably, the safety signal generator is attached directly to the link plate. Further preferably, the actuating element of the safety signal transmitter is mounted displaceably perpendicular to the actuating rod.

In a further particularly preferred embodiment of the gate assembly, the bearing point of the link plate is a central bore of the link plate, in which a laterally projecting shaft piece is used, which serves for the rotatable mounting of the link assembly, wherein the safety signal transmitter is integrated into the shaft piece. This results in a particularly simple, inexpensive and compact design. For a precise storage of the link arrangement, it is advantageous if the shaft piece protrudes from both sides of the link plate. The shaft piece preferably further comprises a gear segment for actuating a switch shaft. Furthermore, it is particularly advantageous if the shaft piece is to be attached to the crank disc according to the Poka Yoke principle. This can be achieved, for example, by the fact that both a bolt-hole connection and a screw connection have to be produced between link disk, with only one mounting situation being possible.

The invention further provides a safety travel switch with a rotatably mounted linkage arrangement. The link assembly comprises a link plate according to the invention with at least one laterally projecting stop pin, which is intended to cooperate with a stop of the safety limit switch to limit the possible rotational range of the link plate about the axis of the bearing. In this case, the cooperating with the laterally projecting stop pin of the link disc stop of the safety drive switch on an exchangeable stop block, wherein the possible rotation range of the link plate is adjustable about the axis of the bearing by the use of different sized stop blocks. This allows us to respond very flexibly to customer requests. The differently sized stop blocks can be kept in stock as standard components, for example. Preferably, two stop bolts and two stops are provided in each case in order to limit the possible rotation range of the link disk in both directions. More preferably, the stop block with a fixed component screwed to the safety drive switch. This results in a simple assembly or interchangeability.

Advantageous embodiments of the present invention are explained in more detail below with reference to drawings. 1 shows a longitudinal section through the actuation unit of a pressure safety travel switch with a link plate according to the invention,

FIG. 2 an oblique view of the actuating unit from FIG. 1, FIG.

3 is a further oblique view of the actuating unit of FIGS. 1 and 2,

Fig. 4 is a front view of the actuator unit of FIGS. 1 to 3 with additional

Components of the pressure safety limit switch,

5 shows a longitudinal section through the operating unit of a rotary safety travel switch with the slotted link according to the invention according to the embodiment of FIGS. 1 to 4, and

Fig. 6 is an oblique view of the actuator unit of Fig. 5. For the following statements applies that the same parts are designated by like reference numerals. If reference drawings are contained in a drawing, which are not discussed in detail in the associated description of the figures, reference is made to the preceding or following description of the figures.

The actuating unit 1 consists essentially of the link plate 2 itself, a shaft 26 inserted into a central bore 5 of the link plate for rotatably supporting the actuator unit in the switch housing, the actuating rod 4, as well as the attached to the upper end of the actuating rod 4 actuating handle 1 1. In Fig. 1 is nen to recognize that the actuating rod 4 is inserted into a receiving bore 3 of the link plate 2, which the bore 5 for receiving the shaft piece 26 crosses and extends through the entire link plate 2 therethrough. In other words, the receiving bore 3 occurs at two opposite points of the outer circumference 10 of the ball senscheibe from the link disc. The receiving bore 3 is designed as a stepped bore and has a larger diameter in the upper half of the link plate than in the lower half of the link plate. In the lower half there is a direct guide of the actuating rod 4 through the receiving bore 3. In the upper part of the stepped bore, a hollow cylindrical hollow shaft 15 is used, which surrounds the actuating rod 4 and protects against damage. The hollow shaft 15 is fixed in the receiving bore 3 by means of a threaded pin 16, which is used by the left side 6 of the crank plate 2. The threaded pin 16 simultaneously limits the stroke of the actuating rod 4, by engaging in a circumferential groove 35 of the actuating rod. The arranged between the actuating handle and the upper end of the hollow shaft 15 coil spring 36 ensures that the operating handle 11 and operating rod 4 are always kept in the unloaded state in an upper position.

As shown in particular in Fig. 2, the shaft piece 26 comprises on the left side 6 of the link plate a gear segment 27, which is engaged with a pinion, not shown, of a switch shaft of the driving safety switch. In the gear segment 27 two holes are provided, which serve to secure the shaft piece 26 on the link plate 2. In one of the two holes engages a corresponding pin of the link plate, in the other hole a corresponding screw 21 is used for attachment of the shaft piece. Also on the left side 6 of the sliding disc a safety signal transmitter 25 is integrated into the shaft piece 26. The safety signal transmitter registers or checks whether the driver actuates the pressure function of the pressure safety travel switch at the required regular intervals and thus gives feedback that he is fully conscious. The actuation takes place by pressing the actuating handle 11. As a result, the actuating rod 4 in the hollow shaft 15 and the receiving bore 3 is pressed down. In this case, the actuating plunger 22 of the safety signal generator 25, which rests against a conically widening portion 23 of the actuating rod 4, is actuated.

As shown in particular in FIGS. 2 and 4, two laterally projecting stop bolts 18 are arranged on the left side 6 of the crank disk 2 near the outer circumference 10, via which the possible angle of rotation of the actuating unit is limited. The two stop pins 18 find their abutment on two mounting blocks 19, which are each bolted to a stationary component 29 of the driving safety switch. The fixing screws 28 serve to fasten this. By means of differently sized stop blocks 19, which can be kept in stock for mounting, the possible angle of rotation of the actuating unit can be set in a simple manner. The driver safety switch can therefore be equipped according to customer requirements with different thickness stop blocks.

In the embodiment shown, a so-called Aufschaltsperre is additionally provided. In the illustrated case, the Aufschaltsperre limits the deflection range to half and prevents the operating handle 1 can be pivoted from the middle position shown in Fig. 4 further to the left. The lock-up lock consists of a lock-up lock plate 30, which is mounted in the lower half of the crank disk near the outer circumference 10 on the left side 6 of the crank disk. The Aufschaltsperrenblech 30 is mounted in the two stop pins 18 and additionally bolted to the link plate. It has a radially projecting hook 31 which engages in the middle switching position with a arranged on the outer periphery 10 of the crank disc pawl 17 into engagement. The pawl 17 is spring loaded and thereby biased against the outer periphery 10 of the crank plate 2. As can be seen in particular from FIG. 1, the lock-up lock can be unlocked by pressing the actuating handle 11. The pawl 17 is thereby deflected by the lower end of the actuating rod 4, which emerges from the lower end of the receiving bore 3 during actuation.

As shown in Fig. 3, the link disc on the right side 7 has two mounting holes 20, which serve to attach a possibly additionally provided brake.

Figs. 5 and 6 show a modification of the operating unit 1 for use in a rotary safety travel switch. The actuating unit is for the most part identical to the embodiment of FIGS. 1 to 4. This means that predominantly the same parts are used, only the actuating rod 4 and the actuating handle 11 attached to the upper end of the actuating rod have to be exchanged. The spiral spring 36 shown in Fig. 1 for the axial bias of the actuating rod 4 is omitted. Instead, a trained as a leg spring torsion spring 9 is used by which operating rod and operating handle are held in a starting position. The leg spring 9 surrounds a bearing sleeve 33, which depends on the actuating supply rod 4 is attached. Spring and bearing sleeve are inserted laterally into a lower recess 8 of the link plate 2. One end of the leg spring is inserted into a pocket 12 formed on the edge of the recess 8. FIG. 6 shows that in each case one insertion pocket 12 is formed on two opposite edges of the recess 8. As a result, by reversing the spring or exchange of the spring in a simple manner, the direction of rotation can be reversed. The replacement of the spring is possible even after initial assembly of the control unit. The possible rotation of the actuating handle about the axis of the actuating rod 4 is limited by an arranged below the bearing sleeve 33 and screwed to the actuating rod 4 stopper disc 34, which formed with a formed in the lower half of the recess 8 stop 32 on the right side of the 7 Sliding link interacts.

The actuating rod 4 is not axially displaceable in this embodiment. Rather, it is axially secured by two retaining rings 14, which are inserted into a second recess 13. The actuation of the actuating plunger 22 of the safety signal transmitter 25 takes place in this embodiment by a cam surface 24 formed on the outer circumference of the actuating rod 4.

The actuating unit acc. Figs. 5 and 6 does not have a lock-up.

Claims

claims

1. link disc (2) for a modular safety travel switch, in particular for a railway safety travel switch, with a bearing (5) and with a substantially perpendicular to an axis of the bearing aligned receiving bore (3) for supporting an actuating rod (4) of the drive switch , characterized in that the receiving bore (3) both for supporting a displaceably mounted actuating rod (4) of a pressure safety drive switch and for supporting a rotatably mounted actuating rod (4) of a rotary safety drive switch as well as for receiving a fixed to the link disc (2 ) connected actuating rod (4) is formed.

Second link disc (2) according to claim 1, characterized in that the link disc (2) on at least one of its two sides (6, 7) for receiving bore (3) leading first recess (8) into which a torsion spring (9 ) is used, by a spring return of the actuating rod (4) is effected.

3. link disc (2) according to claim 2, characterized in that the first recess (8) between the bearing point (5) and an outer periphery (10) of the link plate (2) is arranged.

4. link disc (2) according to claim 2 or 3, characterized in that at one edge of the first recess (8) at least one pocket (12) for suspending an end of the designed as a leg spring torsion spring (9) is formed.

5. crank disc (2) according to claim 4, characterized in that at two opposite edges of the first recess (8) each having a pocket (12) for hooking an end of the designed as a leg spring torsion spring (9) is formed.

6. link disc (2) according to one of claims 2 to 5, characterized in that the link plate (2) on at least one of its two sides (6, 7) has a receiving bore (3) leading second recess (3) which is spaced is arranged to the first recess (8).

7. link disc (2) according to one of claims 1 to 6, characterized in that the receiving bore (3) is designed as a stepped bore.

8. link disc (2) according to one of claims 1 to 7, characterized in that extending the receiving bore (3) continuously through the entire link plate (2).

9. link disc (2) according to one of claims 1 to 8, characterized in that at least one side (6) of the crank disc (2) at least one laterally projecting stop pin (18) is arranged, which is provided with a stop ( 19) of the safety drive switch to limit the possible range of rotation of the link plate (2) about the axis of the bearing (5).

10. link assembly (1) for a modular safety travel switch, with a link disc (2) according to one of claims 1 to 9, one in the receiving bore (3) mounted actuating rod (4), and with a safety signal generator (25), wherein an actuating element (22) of the safety signal generator (25) is designed and positioned such that it is rotatable in the. By both an expanding portion (23) of a displaceably mounted in the receiving bore (3) actuating rod (4) and by a cam surface portion (24) Receiving bore (3) mounted actuating rod (4) can be actuated.

11. linkage arrangement (1) according to claim 10, characterized in that the bearing point (5) of the link plate (2) is a central bore of the link plate (2), in which a laterally projecting shaft piece (26) is inserted, for rotatable mounting the gate assembly (1) is used, wherein the safety signal generator (25) is integrated in the shaft piece (26).

12. Safety travel switch with a rotatably mounted linkage arrangement (1), preferably according to claim 10 or 11, wherein the linkage arrangement (1) has a link disc (2) according to claim 9, and wherein the laterally projecting impact striker (18) of the link disc (2) cooperating stop (19) of the safety drive switch has a replaceable stop block (19), wherein the possible rotation range of the crank disc (2) about the axis of the bearing (5) by the use of different sized stop blocks (19) is adjustable.