CS243293B1 - A device for defining extreme positions, in particular a linear hydraulic motor - Google Patents

Abstract

The solution falls into the field of control devices and solves the design of a device for defining extreme positions, in particular a linear hydraulic motor controlling a support of a machine tool. The essence of the solution is that in a hydraulic motor, in the cylinder (1) of which a hollow piston rod (4) is mounted, the rear end (42) of the piston rod (4) is blinded by a plug (6), which is provided with a fixed stop (61) and in which the rear movement screw (7) is mounted in a movably manner. The front end (43) of the piston rod (4) is terminated by an inner cover (10), through which the front movement screw (11) freely passes, provided inside the piston rod (4) with an adjustable stop (12) and outside the piston rod (4) with a control wheel (14) with a spring-loaded stop (15).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for defining extreme positions, in particular a linear hydraulic motor controlling a machine tool support.

Slide or other sliding parts of machine tools with a linear hydraulic motor drive are usually equipped with adjustable fixed stops and rails with adjustable stops for limited path lengths, which, when approaching a fixed stop, control an appropriate electrical switch to change the direction of movement or implement some other function of the machine tool.

The disadvantage of this embodiment lies in the greater demands for adjustment, since, in addition to the fixed stops, the so-called electrical stop has to be set quite precisely because the electrical signal must be transmitted at the moment of approaching the fixed stop. Since both the fixed stops and the electrical stops are always located outside the slide or sliding part, the flying chips or the total dust environment can cause a malfunction of the stop system.

The above drawbacks of the known solutions are substantially eliminated by the invention, which is a device for defining extreme positions, in particular a rectilinear hydraulic motor, in which the hollow piston rod with the piston is mounted, and the back end of the piston rod is blinded with a stopper provided with a fixed with a stop and in which the rear movement bolt is mounted, and in that the front end of the piston rod is terminated by an inner lid, through which a forward movement bolt, provided with an adjustable stop within the piston rod, extends outside the piston rod by a control wheel with a spring-loaded stop.

It is a further object of the invention that the rear motion screw is anchored in the console-operated device.

Finally, it is an object of the invention that a handle for determining the piston rod stroke is radially fixed at the front end of the piston rod.

In comparison with the devices used up to now, according to the invention, a higher effect is achieved in that the accuracy of the set position is not dependent on the working environment and the adjustment of the stops is simpler than with the existing systems. An example of a particular execution by

Claims (3)

OBJECT An apparatus for defining extreme positions, in particular a rectilinear hydraulic motor in which a hollow piston rod with a piston is mounted, characterized in that the rear end (42) of the piston rod (4) is plugged with a stopper (6) provided with a fixed stop (Θ1) and in which the rear movement bolt (7J is supported) and in that the front end (43) of the piston rod (4) is terminated by an inner lid (10) through which the forward movement screw (11) extends freely within the piston rod ( 4) an adjustable stop (12) and, outside the piston, a schematic illustration of a longitudinal section of a linear hydraulic motor with a built-in device, according to the invention. provided with a piston 41. The inner space 101 of the cylinder 1 is sealed against the external environment by a seal 5. The piston rod 4 is on the The end constant position of the piston rod 4 is defined by an electrical stop 9 disposed in contact with the fixed stop 61. The base constant position of the piston rod 4 is defined by an electric stop 9 disposed in contact with a fixed stop 61. The front end 43 of the piston rod 4 is terminated by an annular inner lid 10, through which a forward movement screw 11, provided with an adjustable stop 12 and an end stop 13 inside the piston rod 4, passes, the adjustable stop 12 being displaceably displaceably mounted on the front movement screw 11. Outside the piston rod 4, a control wheel 14 is mounted on the front movement screw 11, provided with a spring-loaded stop 15 against which an electric switch 16 is disposed. The piston rod 4 is then mounted radially on the piston rod 4 to determine the stroke of the piston rod 4 on a scale 18 located on the bracket 8. In the basic position of the piston rod 4, the piston 41 is supported by the front cover 2 and the fixed stop 61 at the rear end 42 of the piston rod 4 is in contact with the electrical stop 9. When the piston rod 4 is changed, piston 41 moves in cylinder 1 until the inner annular ring the lid 10 strikes an adjustable stop 12, the setting of which defines a second extreme position of the piston rod 4. At this point, the spring-loaded stop 15 closes an electric switch 16, on the basis of which another function of the machine is realized. The stroke of the piston rod 4 is transmitted via the rear movement bolt 7 and the bracket 8 to a coupled component (not shown), for example a machine tool support. If the hydraulic engine operation mode needs to be changed, the controls 12, 14, 16, 9, 71 are adjusted to the desired position. INVENTION (4) a control wheel (14) with a spring-loaded stop (15). 2. The device for defining extreme positions according to claim 1, wherein the rear movement screw is formed in a console of the actuated device. 3. A device for defining extreme positions according to claim 1, characterized in that a handle (17) for determining the stroke of the piston rod (4) is radially fixed at the front end (43) of the piston rod (4). 1 sheet of drawings 243293