DD217581A1 - HYDRAULIC STEPPER MOTOR WITH AXIAL LIFTING MOVEMENT - Google Patents

Abstract

Hydraulic stepper motor with axial stroke movement for rotating and axially displacing a component assumes that these movements are integrated in one device. In this case, there is an axially displaceable piston in a cylinder of a Gehaeuses and in the rotary cell, there is a Drehwinkelfluegel about the going through the rotary piston rod. By acting on the piston with oil this moves upward (relaxing or loosening of the lock) and then rotates due to the existing pressure difference in the system of Drehwinkelfluegel, the piston rod is entrained by a clamping or driving mechanism and a rotation by a certain angle experiences. By the movement of the piston down the locking of the reached position takes place. Subsequently, the Drehwinkelfluegel rotates back to the starting position, the clamping between the angle of rotation and piston rod is repealed. Fig. 1

Description

Title of the invention

Hydraulic stepper motor with a social eb movement

Field of application of the invention

The invention finds application in the automated cutting tip change on turning tools and beyond in robotics z. B. when pivoting and clamping of grippers,

Characteristic of the known technical solutions

Translational motion elements are known in hydraulics as working or clamping cylinders in single and double-acting design and are available in the standard range (eg TGL 10906).

Angle of rotation motors are not subject to standardization, but are offered for defined rotational movements by the hydraulic industry.

Stepping motors with pure stepping of the rotary motion are described in the international patent classification J 16 H 27/00; 27/02; 29/12; 29/20 are listed as stepping gear units. The disadvantage of the known technical solutions is the fact that the stepping can be made only for a movement form (stepping of the translation, stepping mechanism of rotation) and that the constructive solutions are complicated and usually require a large volume of construction.

Object of the invention . ^ ·

The aim of the invention is to provide a constructive solution which makes it possible to perform a series connection of the rotational movement with simultaneous axial lifting movement of the component.

Explanation of the essence of the invention

I) ex invention, the object is based on an axially displaceable piston rod of a piston-cylinder system '·; to arrange a turn angle wing *

 The swinging vane has an internal system that only creates a force-locking connection between the piston rod and the swinging vane when rotating in one sighting Stroke movement of the piston system possible »

Due to the one-sided acting clamping mechanism, the rotary vane works as a stepping motor. According to the invention, the constructive solution is provided as follows:

A rotationally symmetric housing accommodates the piston with the piston rod and the angle of rotation vane. For this purpose, a cylinder and a rotary cell are provided at the end faces, which are closed by a housing cover after the assembly of pistons, piston rod and rotary vane

become" . ,

In the cylinder is the axially displaceable piston whose piston rod passes through the rotary cell and the upper housing cover. The rotary cell receives the rotatably mounted on the piston rod rotary wing.

In the rotary angle wing is the clamping mechanism, consisting of rolling elements and wedge-shaped gap. If pressure oil is supplied to the cylinder, the piston moves upwards with the piston rod, ITach after reaching the end

βθ position begins the rotation of the rotary vane.

This pressure-dependent [sequential control is achieved by the installation of pest chokes between the piston system and the rotary vane. · The clamping system creates a non-positive connection between the sash and the piston rod and rotates the piston rod until a defined end position is reached. After reaching the angular position of the return stroke of the piston takes place by reversing the 01-streams by way of valve »The piston moves into the

TO starting position back. Due to the pressure difference across the throttle, the turning angle vane is turned back only after reaching the end position of the piston. During this rotational movement of the small mechanism is released. The Büekstellbewegung the rotary angle wing in the starting position is done without changing the angular position of the piston system.

Different angular positions can be achieved by replacing the fixed stop for the rotary angle wing *

Ausführungsbe ispiel . , '

The invention will be explained in more detail by two drawings, which illustrate an embodiment. If the directional control valve 14 is in position 0, then the oil coming from the pump is conveyed back into the oil tank and the hydraulic rotary-angle drive is in the box. , If a rotational angle step is to be made, the E-magnet 1-5, Pigur 2, must be energized, so that the directional control valve 14, FIG. 2, is in position 1. The oil coming from the pump is fed into the cylinder 6, Pigur 1 ,. Due to the smaller diameter of the bore 10 relative to the bore 8, the pressure builds up later in the rotary cell than in the cylinder 6, ie only when the piston 1 its upper Reached the end position, the necessary pressure builds for turning

of the turning angle wing. The upper bore 10 acts ^[such as a choke,! Figure 2. Through the rotation of the rotation angle blade 3 in the clockwise direction, the rolling bodies are pushed 17 into the wedge-shaped gap so that a frictional connection between the pivot angle wing 3 and piston rod 4 is formed and the piston rod with pistons · * The angle to be reached is limited by a pest stop 1.9 », which is located in the rotary cell 7, .. By the movement of the piston 1 upwards, a tension or locking of an outward on the KoI-. , Bengeh located component abolished.

Upon reaching the angular position, the locking of this position takes place * For this purpose, the? 7egeventil 14, Pigur 2, reversed. The B-solenoid 16 is energized, the directional control valve 14 is switched to position 2. The oil delivered by the pump is introduced into the cylinder through the bore 9 _; Due to the larger diameter of the bore 9 against the diameter of the bore 11, the pressure in the cylinder 6 builds up first, so that the piston 1 moves downward. Thus, the clamping or locking can take place. "After the just completed movement, the er builds. required, pressure to move ^ of the rotary vane 3. The angle of rotation wing now moves counterclockwise, with the non-positive connection between the piston rod 4 and 3 rotational angle triggers, cU iu the rolling elements 17 move out of the wedge-shaped gap 18. The piston rod 4 remains when turning back the rotary vane 3 at rest .. Is the Angular angle wing arrived in its initial position on the stop 19, then the entire operation is abge.schlossen.

For this purpose, the excitation in the "magnet 16", "Pigur 2", is switched off "and the directional control valve jumps into position Eine. A further operation can be initiated.

5 The cylinder and the three-cell are each closed by a housing cover 12 and 13 ♦ In addition "is the housing 2 in.einem ölatdichtenden housing 5. '

If other angular positions are to be achieved, the fixed stop 19 must be replaced by other stops.

Claims (3)

Erf indungsans pruch 1. Hydraulic stepper motor with axial stroke characterized 'characterized in that on a piston rod (4) ^: a double-acting hydraulic cylinder (1; 6) in a rotary cell (7) a Drehwinkelflüge! (3) is arranged, which by a clamping device (17; 1S), the rotation of the piston (1) in a sighting. , , , 2. A hydraulic stepping motor according to item 1, characterized in that the oil inlet holes (8; 10) and oil outlet holes (9j 11) have different diameters and that either the cylinder (6) or the rotary cylinder , cell (7), which performs the first movement, the gxö- · bere bore receives. , '. . 3 · Hydraulic high-speed engine according to item 1, characterized in that the angle of the rotary movement is selected with the angle of the fixed stop (19). . "See also S \ Page: Drawings"