DE20318620U1 - Pressure cylinder arrangement with position sensors for the position detection of the piston position - Google Patents

Abstract

The invention relates to a hydraulic cylinder arrangement provided with a positional sensor for detecting a piston position comprising at least one analog positional sensor (1) and at least one hydraulic cylinder (4) containing a piston (8) which is axially guided and to which a piston rod (6) is axially connected in such a way that it hermetically penetrates through the cylinder casing cover (5) and projects therefrom and at least one electric valve which is connected to at least one programming device (3) by means of at least one signal line (9), wherein said positional sensor (1) determines the stop position of the piston (8) and transmits said position through the signal line (9) to the programming unit (3) which records the actual stop position of the piston (8) in the non-volatile memory (12) of the positional sensor (1).

Description

The invention relates to a pressure medium cylinder arrangement with position sensors for the position detection of the piston position with at least one analog Position sensor, and with at least one pressure medium cylinder, in which is an axially guided piston is arranged, with which a piston rod is connected coaxially, which protrudes from the cylinder housing through a housing cover provided with seals, and with at least one electromagnetic valve that with at least a signal line connected to at least one programming device is, according to the preamble of claim 1.

From the DE 198 27 765 C2 Such a pressure medium cylinder arrangement with position detection of the piston position is already known.

The pressure cylinder arrangement with position detection of the piston position in this example a sensor and an attachment. The attachment has a proximal one End on, which rests on a cylinder tube to the position of the Fix fixing. The proximal end has a first fastening groove in which a pull rod is inserted, and first set screws for attaching the inserted tie rod to the attachment. on the other hand a second fastening groove is formed in the tip section, and the sensor can be placed in this groove in such a way that the position of the sensor in the axial direction of the cylinder barrel is adjustable. The attachment can be done independently in the correct Angles can be attached to the drawbar by the attachment attached to the drawbar while the tip section the attachment rests on the cylinder barrel. So that the sensor in independent Way to be fixed on the tie rod, thereby completing the fastening process is simplified. Moreover the sensor can be replaced or to adjust its position in independent Way to be installed or removed without the attachment too to solve, which simplifies maintenance.

The sensor can be used a second set screw at any position in the Anchoring groove to be anchored. The second set screw and the first set screws for the attachment can be provided in the same direction so that they are from the same Direction can be rotated using a tool.

This configuration avoids working spaces in two Directions, accomplishing the operations described above using the tool reliable even in small workrooms carried out can be. The fastening groove preferably has a cross section, which is shaped to have groove width while the sensor is ready has, is smaller than the inner groove width of the fastening device groove but bigger than the groove width of the opening. Thus, when turning the second set screw, the manufacturing process the frictional connection between the tip of the screw and the groove bottom the mounting groove the sensor from the opening of the mounting groove pressed to make a firm mount.

The disadvantage of the known Pressure fluid cylinder arrangement, however, that an access for the sensor setting must be observed during assembly.

During sensor adjustment work the pressure cylinder arrangement inside a machine installed, this means an additional effort in the expansion and reinstalling the pressure cylinder assembly.

The object of the invention is therefore, a sensor setting option without the need to access the fluid cylinder assembly to accomplish.

The task is based on a pressure cylinder arrangement with position sensors for the position detection of the piston position according to the preamble of the claim 1 solved in connection with its characteristic features. The following under claims give advantageous developments of the invention.

The object is achieved in that the position sensor detects the stop position of the piston and via a Signal line forwards to a programming device, which in turn the current stop position of the piston in a non-volatile Position sensor memory.

This solution has the advantage that the position detection of the piston position can be carried out via a remote setting can, which makes direct access to the pressure cylinder arrangement superfluous and thus the elaborate training and installation work of the pressure cylinder arrangement are spared.

Furthermore, the size of the position sensor by using an EPROM kept quite small, so the overall size of the position sensing device is minimal.

An advantage of the invention is that also a mobile position SET module as an alternative to a fixed one Programmer - preferably one PLC (programmable logic controller) is - can be used. Here drives the piston first in the desired one Position what about a Button of the position SET module this position is accepted.

Further improving the invention activities go from the dependent claims or are described below together with the description of a preferred embodiment of the Invention with reference to the figures shown. It shows:

1 is a schematic side view of a pressure cylinder arrangement with Positionssen sensors for position detection of the piston position with remote adjustment using a signal line and a stationary programming device designed as a PLC,

2 is a schematic side view of a pressure cylinder arrangement with position sensors for the position detection of the piston position with remote adjustment with a position SET module.

According to 1 contains a pressure medium cylinder arrangement with position sensors for the position detection of the piston position, including an analog position sensor 1 which is a non-volatile memory 12 contains and to a pressure cylinder 4 is attached in which an axially guided piston 8th is arranged on which a piston rod 6 is connected coaxially by a housing cover provided with seals 5 protrudes from the cylinder housing and is supplied with pressure energy by an electromagnetic valve. Both the position sensor 1 as well as the electromagnetic valve are on a signal line 9 with a programming device 3 connected. The pressure medium cylinder arrangement together with the position sensor 1 and the electromagnetic valve 7 is built into a machine. The pressure medium cylinder arrangement does not necessarily have to be accessible. The programming device implemented here as a PLC 3 consists of an electrical power supply 31 , a CPU 32 , an input signal connector 33 and an output signal connector 34 , The signal line 9 connects the pressure cylinder arrangement and the electromagnetic valve 7 via two interfaces 10 and 11 with the programming device 3 , The piston 8th is by means of the electromagnetic valve 7 moved to a position by the position sensor 1 is recorded as the stop position. This position is then from the programming device 3 as the current stop position in the non-volatile memory 12 programmed. Another, opposite stop position can be from a second position sensor 2 are detected and by the programming device 3 than the current, second stop position in the non-volatile memory 13 be programmed. The position sensor 1 works analog, whereas digital data transmission takes place. The signal line 9 is implemented as a data bus. The non-volatile memory 12 can be executed as EPROM.

That in the 2 The illustrated embodiment differs from the previously explained embodiment in that a mobile position SET module instead of a stationary programming device for position programming 15 is used. Here is the piston rod 6 against a mechanical end stop 18 hazards. One LED 16 of the position SET module 15 lights up. A push button 17 of the position SET module 15 is pressed so that the LED 16 lights up with a steady light. The position of the piston 8th takes into account the tolerances via the position SET module 15 in the position sensor 1 saved.

1

position sensor

2

position sensor

3

Programming device (PLC)

4

Pressure cylinder

5

cover

6

piston rod

7

electromagnetic Valve

8th

piston

9

signal conductor

10

interface

11

interface

12

non-volatile Storage

13

non-volatile Storage

14

Pressure medium supply

15

Position-SET module

16

LED

17

button

18

mechanical end stop

31

electrical Energy supply for the programming device

32

CPU for the Programming device

33

Input signal terminal

34

Output port

Claims (7)

Pressure medium cylinder arrangement with position sensors for the position detection of the piston position with at least one analog position sensor ( 1 ), and with at least one pressure cylinder ( 4 ) in which an axially guided piston ( 8th ) is arranged on which a piston rod ( 6 ) is coaxially connected by a housing cover with seals ( 5 ) protrudes from the cylinder housing, is attached and with at least one electromagnetic valve which is connected to at least one signal line ( 9 ) with at least one programming device ( 3 ), characterized in that the position sensor ( 1 ) the stop position of the piston ( 8th ) detected and via the signal line ( 9 ) to the programming device ( 3 ), which in turn the current stop position of the piston ( 8th ) in the non-volatile memory ( 12 ) of the position sensor ( 1 ) stores. Pressure medium cylinder arrangement with position sensors for the position detection of the piston position with remote adjustment according to claim 1, characterized in that the non-volatile memory ( 12 ) is executable as Eprom. Pressure cylinder arrangement with position sensors for the Position detection of the piston position with remote adjustment according to claim 1, characterized in that the data transmission can be carried out via a data bus. Pressure medium cylinder arrangement with position sensors for the position detection of the piston position with remote adjustment according to claim 1, characterized in that the position sensor ( 1 ) is digital. Pressure medium cylinder arrangement with position sensors for the position detection of the piston position with remote adjustment according to claim 1, characterized in that the stop position of the piston ( 8th ) with a remote location from the pressure cylinder ( 4 ) arranged position SET module ( 15 ) is detectable. Pressure medium cylinder arrangement with position sensors for the position detection of the piston position with remote adjustment according to claim 5, characterized in that at least one LED ( 16 ) of the position SET module ( 15 ) the stop position of the piston ( 8th ) lights up. Pressure medium cylinder arrangement with position sensors for the position detection of the piston position with remote adjustment according to claim 5, characterized in that by actuating at least one button ( 17 ) of the position SET module ( 15 ) the stop position of the piston ( 8th ) in the non-volatile memory ( 12 ) of the position sensor ( 1 ) can be saved.