DE1261401B - Remote control device - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

Number:
File number:
Registration date:
Display day:

F15b

German KL: 60-30

1261401
W 26067 I a / 60
July 23, 1959
15th February 1968

The invention relates to a remote control device for the gradual adjustment of an output part, with several from one position transmitter Via connections controlled pressure medium-operated actuators, which the setting given to them transmitted to the output part via a common transmission device.

There are known remote control devices of the aforementioned type in which the adjustable in stages Positioner controls the letting in and letting out of pressure media in and out of the cylinder, in which displaceable pistons are arranged as actuators. The training of these well-known bodies is such that in certain positions of the position transmitter pressure medium is in a cylinder to let in and to let out from another cylinder at the same time to the pistons at the same time move in opposite directions, d. that is, in these cases, the position provider is in the to cause several changes to the control connection leading to the actuators. If now here the position transmitter for any reason between two positions. stops or from the one position is slowly moved to the next position, then this leads to the disadvantage that the The output part experiences an incorrect adjustment because the required movement processes of the piston do not enter at the same time.

The purpose of the invention is to create a remote control device of the type mentioned at the beginning which the described disadvantage of the known devices, which can be particularly serious, if the control device is used, for example, for braking systems in rail vehicles should be turned off. In other words, the invention ensures with certainty that that no matter how slowly the positioner moves from one position to the next Position is moved, and no matter wherever he stops between the two positions, always the correct adjustment sequence of the output part relative to the adjustment sequence of the position transmitter is obtained.

According to the invention, this is the case with a remote control device of the type mentioned at the outset achieved that the position transmitter for each subsequent position only a single change in the causes existing control connection at the current position, which is electrically operated Acts switch, which in turn closes the known solenoid valves for the supply of pressure medium control the actuators.

Remote control device

Applicant:

Westinghouse Brake & Signal Company Limited,
London

Representative:

Dr. E. Wiegand and Dipl.-Ing. W. Niemann,
Patent Attorneys, 2000 Hamburg, Königstr. 28

Named as inventor:

John William Greenwood, London

Claimed priority:

Great Britain July 25, 1958 (23 967)

According to a feature of the invention, the arrangement is made so that the position transmitter for every single change is a single one of a plurality of those provided in the control connection electrical lines either energized or de-energized. The switches can be the result of each Changes in the existing electrical connections as a result of multiple changes convert the positions of the actuators.

A particular embodiment of the invention is characterized by the combination of the plurality electrical connection lines, each to the excitation windings of an equal number of Electromagnetic switches lead, an electrical feed line through the position transmitter connected to the connecting lines or disconnected from them, the solenoid valves to Actuation of the actuators and a circuit through which the excitation windings of the solenoid valves are fed and which contains contacts that are operated by the switches, wherein changed more than one of the positions of the actuators for certain stages of the position transmitter will. In such an embodiment, three unilaterally spring-loaded actuating pistons for eight different Positions may be provided.

Another embodiment in which pressure medium control connections are provided, is characterized in that two actuating pistons with different stroke lengths for four different positions are provided, which are connected by a rod

809 508/194

Γ 261 401

are connected to each other, to which a handlebar is articulated, the displacement movements of the The actuating piston is transferred to a rotatable lever via a cam disk, and a mechanical stop the displacement of the actuating piston with the greater stroke length is limited as long as the other Adjusting piston is shifted. In this embodiment, a third actuating piston can be provided, which brings the rotatable lever into engagement with another cam disc, which in reverse Working sequence of the other two actuating pistons the rotatable lever in further successive Positions moved.

The invention is explained below with reference to the drawing, for example.

Figures 1 and 2 illustrate in schematic form Way a mechanically working embodiment of a remote control device according to the invention;

F i g. Figure 3 schematically shows an electrically operating embodiment of the invention again. "

In the case of the in FIG. 1 and 2, three pressure-actuated actuating pistons A, B and C are provided as actuators, of which the two actuating pistons A and B, which have different stroke lengths (Fig. 1), are arranged with their axes in one plane, while the third actuating piston C (Fig. 2) is arranged with its axis in a plane extending at right angles to the aforementioned plane. Each actuating piston is loaded on one side by a spring that holds it in its unshifted position on the bottom of its cylinder. By letting pressure medium into the cylinder of each adjusting piston under the control of a position transmitter (not shown), the adjusting piston is moved into a displaced position.

The piston rods of the two actuating pistons A and B , which can be pivoted laterally to a small extent, are connected to one another by a rod L to which a link R is articulated at a point in the middle, which is connected to a rotatable spindle S on which two cam disks Z and Y are attached side by side. These parts belong to a common transmission device which transmits the settings of the actuating pistons to an output part OM , which can be adjusted in steps, which is assumed here as an angle lever pivotable about a fixed axis, one arm of which carries a roller Z , which is a follower part for the cam disks X and Y forms. The roller Z has such a width that it only engages with one of the cam disks 2 and Y at a time. The displacement of the RpIIeZ from one cam disk to the other takes place through the piston rod of the third Sfellkolkolbens C (Fig. 2), which is connected to the spindle S coaxially to this. When pressure medium is let into the cylinder of the third actuating piston C, its piston rod moves the spindle S ^ in order to bring the roller Z out of engagement with the cam disk X and into engagement with the cam disk Y.

The position transmitter (not shown) is designed in such a way that it controls the supply of pressure medium to the three actuating pistons A, B and C by opening and closing mechanically or electrically controlled valves in such a way that for each of eight positions (»0 <i "to" 7 ") of the position transmitter results in the state of the three actuating pistons specified in the table below, whereby in the table" n "means that the piston in question is not displaced, while" v "means that the piston in question is shifted.

Position transmitter A. Control piston
B. C. 0 η η η IO 1 V η η 2 V ν η 3 η ν η 4th η V ν 5 Ύ γ ν 15 6 ν η ν 7th η η ν

From this table it can be seen that the position transmitter causes only a single change in the positions of the three actuating pistons A, B and C between two successive positions. '

From Fig.l the different positions which the rod L assumes for the different positions of the two actuating pistons A and B are evident, and the positions of the moving articulation point of the link R on the rod L are corresponding to the associated positions of the position transmitter with »0 «To» 7 «.

When the position transmitter is moved from the "0" position to the "1" position, only the actuating piston A is displaced so that the rod L reaches a position indicated in FIG. 1 by the dash-dotted line inclined downward to the right . If the position transmitter is moved from position "1" to position "2", if the actuating piston A is displaced, the actuating piston B is displaced by a greater stroke length until the rod L engages a mechanical stop N , which prevents actuating piston B carries out its full displacement movement; the rod L therefore assumes a position which is shown in FIG. 1 is indicated by the horizontal dash-dotted line. The pressure of the pressure means acting on the actuating pistons A and B is related to the force of their springs in such a way that a stable state is obtained

• is, ie that the displaced actuating piston A is not moved back. Only when the position transmitter moves from position "2" to position "3" is the actuating piston A moved back and the actuating piston B txl allowed to move fully, whereby the rod L rotates around the stop N into the position which is indicated in Fig. 1 by the dash-dotted line inclined to the top right.

For the positions »0« to »3« of the position transmitter, the spindle S and thus the one on it. arranged cam disks X and Y a gradual progressive rotary movement in clockwise direction, whereby the roller Z following the cam disc X gives the output part, ie the pivotable angle lever OM assumed as an example in the present case, a progressive rotary movement also in a clockwise direction. When the 'position transmitter is moved from position "3" to "position-" 4, the third actuating piston C is shifted, whereby the roller Z is transferred from the cam disk X to the cam disk Y without the rod L being affected against- '

level, position inclined upwards to the right is changed. A smooth transition of the roller Z from one to the other cam disk is made possible by means of a frustoconical guide piece (FIG. 2) provided on the roller. So that a further step of progressive adjustment of the output part OM is obtained in the position "4" of the position transmitter, the effective part of the cam disk Y, to which the roller Z is transferred, has a larger diameter than the effective part of the cam disk X- .

When the position transmitter continues to move between positions "4" and "7", the only change in the positions of the two actuating pistons A and B is brought about in reverse order, with the third actuating piston C remaining in the shifted position. The effective part of the cam plate Y increases in the reverse direction to the effective part of the cam plate X , and as a result, although the spindle S is now rotated in the counterclockwise direction, the bell crank OM forming the output part is further rotated in a clockwise direction in steps.

In the case of the in FIG. 3 reproduced second embodiment of the invention, three actuators in the form of actuating pistons A, B and C are provided, which transmit the settings given to them via a common transmission device in the form of a known lever system to the progressively stepwise adjustable output part OM , which here too for the sake of simplicity is assumed as a pivotable angle lever.

In this embodiment, the setting of the three actuating pistons A, B and C results in the states indicated in the table below, where again in the table "n" means that the actuating piston in question is not displaced, while "v" means that the relevant actuating piston is displaced.

40

45

Position transmitter A. Control piston C. 0 η η η 1 V η η 2 η ν η 3 ν ν η 4th η η ν 5 ν η ν 6th η ν γ 7th ν ν V

This table shows that when the position transmitter moves between positions "1" and "2", "3" and "4", "5" and "6", there are multiple changes in the positions of the three actuating pistons, however the position transmitter causes only a single change in the connections of three lines a, b and c with an electrical feed line, the sequence of these individual changes proceeding according to the table explained in the description of the first embodiment.

The lines a, b, and c each lead to excitation windings of electromagnetically operated switches CA or CB and CC, the contacts of which are in a circuit via which the excitation windings of solenoid valves for the pressure medium supply to the actuating pistons A, B and C are fed. The design is such that the sequence of the individual changes in the connecting lines a, b and c caused by the position transmitter is converted into a sequence of the settings of the actuating pistons A ₁ B and C as described above.

In the embodiments described, it is assumed that the common transmission device between the actuators and the output part to be adjusted in steps of mechanical Art is, but could be replaced by a transmission device operating in a different way be used.

The gradual advancing movement obtained at the output part can, depending on the intended Function of the remote control device, can be used in various ways. For example it can be used in rail vehicles to remotely control a machine valve or it can be used for remote control of pressure-actuated brakes to set a double seat valve, which allows the admission of pressure medium into a brake cylinder controls.

Claims (7)

Patent claims: 1. Remote control device for the gradual adjustment of an output part with several pressure medium-operated actuators controlled by a position transmitter via connections, which transmit the setting given to them via a common transmission device to the output part, characterized in that the position transmitter only makes a single change in the for each subsequent position the current position causes control connection (a, b, c) , which acts on electrically operated switches {CA, CB, CC) , which in turn control known solenoid valves for the pressure medium supply to the actuators (A, B, C). 2. Remote control device according to claim 1, characterized in that the position transmitter for each single change in each case a single one of a plurality of electrical lines (a, b, c) provided in the control connection either energized or de-energized. 3. Remote control device according to claim 2, characterized in that the switches (CA, CB, CC) the sequence of the individual changes in the existing electrical connections (a, b, c) in a sequence of multiple changes in the positions of the actuators (A, B , C) convert. 4. Remote control device according to one of claims 1 to 3, characterized by the combination of the plurality of electrical connecting lines (a, b, c) which each lead to the excitation windings of an equal number of the electromagnetic switches (CA, CB, CC) , an electrical feed line which is connected to or disconnected from the connecting lines (a, b, c) by the position transmitter, the solenoid valves for actuating the actuators (A, B, C) and a circuit via which the excitation windings of the solenoid valves are fed and which Contains contacts which are operated by the switches (CA, CB, CC) , with more than one of the positions of the actuators (A, B, C) being changed for certain stages of the position transmitter. 5. Remote control device according to one of claims 1 to 4, characterized in that three unilaterally spring-loaded actuating pistons are provided for eight different positions. 6. Remote control device according to claim 1 with pressure medium control connections, characterized in that two actuating pistons (A, B) with different stroke lengths are provided for four different positions, which are connected to one another by a rod (L) on which a handlebar (R) is articulated, which controls the displacement movements of the actuating piston via a The cam disc (X) is transferred to a rotatable lever (OM) , and a mechanical stop (N) limits the displacement of the actuating piston (B) with the greatest stroke length as long as the other actuating piston (A) is displaced. 7. Remote control device according to claim 6, characterized in that a third actuating piston (C) is provided which. brings the rotatable lever (OM) into engagement with a further cam disk (F) which moves the rotatable lever into further successive positions when the other two actuating pistons (A, B) work in reverse order. Considered publications:
British Patent Nos. 538 168, 590 175,
201. 1 sheet of drawings 809 508/194 2.68 © Bundesdruckerei Berlin