DD294655A5 - DEVICE FOR SELF-ACTING, OWN GAME COMPARISON - Google Patents

Abstract

The invention relates to a device for selbsttaetigen, local clearance compensation within Axialgleitfuehrungen, which is characterized by low Abmasze and gewaehrleistet in any functional position of Gleitfuehrung a complete backlash. According to the invention, this object is achieved by arranging freely movable rolling elements clamped by elastic members between the contact surfaces of the sliding guide, the rolling planes of which are at a specific angle to one another and to the plane of the rolling elements. Fields of application of the invention are in particular manipulators and reversing translation units. Fig. 1 {device; Compensation; Game; slide; Play compensation; manipulators}

Description

For this 3 pages drawings

Field of application of the invention

The invention relates to a mechanism for automatic, local clearance compensation within axial sliding guides on machine tools, in particular on manipulators and reversing translation units.

Characteristic of the known state of the art For clearance compensation in Axialgleitführungen facilities are known in which by means of screws or springs directly or

indirectly via wedges or rollers, the game in length guides or adjusted.

Thus, DD-OS 216076 describes an automatic biasing device for carriage guides on machine tools, in the

at least 2 wedge-shaped clamping bodies are arranged movably in a row parallel to the guide track. These clamping bodies are loosely arranged around a central clamping element and resiliently mounted in one direction. Due to the chosen arrangement of

Spring and the perpendicular to the guide direction resiliently acting transmission elements is the generated bias

regardless of the wear of the guideway, but acts consistently only in one direction of movement of the carriage.

DE-OS 3143092 describes a device for equiaxial guidance of two guide partners. This guide will be dut ch

realized an element which is characterized by its sleeve-like design and circumferentially mounted recesses. These recesses form by their group-wise arrangement against each other parallel leaf springs, which coincide with the transverse planes of the element. Thus, both leaders are guided gap-free in the axial direction and at the same time rigidly supported against torsion, transverse displacement and tilting.

Furthermore, EP OS 0152983 describes a device for guiding two guide partners, wherein the axial guidance of the

a partner by a plurality of radially attached to the guide axis, elastic elements for clamping the

Compensation elements is realized without play. A disadvantage is considered in these solutions that both the compensatory movements and the elastic Preload of the compensating elements takes place in the radial direction, whereby upon occurrence of transverse zuzr guide direction

attacking forces these act directly on the elastic elements.

Another disadvantage is the fact that increased friction occurs due to the tension of the sliders. Object of the invention

The object of the invention is to provide a device of small dimensions, which ensures complete freedom from play in any function-related position of the sliding guide.

Explanation of the essence of the invention The object of the invention is to provide a mechanism which, by simple means, regardless of the position of Sliding, realized an automatic, local clearance compensation within Axialgleitführungen. According to the invention, this object is achieved in that between the contact surfaces of the sliding freely movable and

arranged by elastic members tensioned rolling elements whose rolling planes are at a certain angle to each other and the plane of the rolling elements.

To prevent rotation, a symmetrical arrangement of several compensation devices in a guide required

his. The clamping takes place perpendicular to the sliding guide and tangential to the guide surface. At axial

Movement of the guide balance the rolling elements by shifting in the direction of tension the existing game there. By this arrangement it is achieved that the qu ars acting on the guide direction forces directly on the Compensating elements act, the bias takes place by the elastic elements, however, in the tangential direction. One or more of these balancing devices can optionally be arranged in the guide. embodiment

The invention is explained in more detail below on the basis of exemplary embodiments and in the associated drawings: In the drawings show

Fig. 1: section perpendicular to the guide direction a Axialgleitführung with the guide housing Fig. 2: guided on axes conical disks as rolling elements Fig. 3a: rolling element with receiving body and spring Fig. 3 b: rolling element and elastic element with integrated receiving body 4a: contact possibilities between the cage and the movement element Fig. 5: two-sided arrangement of the clearance compensation. Fig. 1 shows in section perpendicular to the guide direction a Axialgleitführung with the guide housing 1, in the axial one Movement element 6 is mounted on the rolling elements 3 in the sliding guide. The rolling elements 3 are by elastic members. 4

clamped perpendicular to the guide direction and parallel to the flat guide surface and held in a cage 5. The elastic members 4 must be designed so that, starting with the elastic member between the cage 5 and the largest

Rolling elements which gradually reduce elastic member spring strips. The contact surfaces between the rolling elements 3

and the fixedly connected to the guide housing 1 pressure piece 2 and between the rolling elements 3 and the

Movement element 6 are at a certain angle to each other. By the displacement of the rolling elements 3 in Tension direction is within the leadership a local, automatic compensation of the shape and deviations of the Guide elements 1,2,6 causes, so that a play-free guidance is ensured. With axial displacement of the Movement element 6 moves the balancer (rolling elements 3, cage 5, elastic members 4) with half Speed and half the amount in the direction of travel, wherein the compensation mechanism shown in Fig. 1

as part of the compensating device can be arranged distributed repeatedly over the length of the cage 5. The mold element 7 realizes an anti-rotation device between the movement element 6 and the guide housing 1.

As rolling elements 3 can optionally balls, guided on axes cone or other discs can be used. The elastic members 4 may be designed as steel springs, rubber elements or other elastic elements, wherein

between the elastic members 4 and the rolling elements 3 as the storage receiving body 8 are arranged or these are integrated into the elastic elements and the elastic elements themselves fulfill the required function.

The contact of the cage S can be done both with the guide housing 1 and the moving element 6. In this case, the contact between the cage 5 and the movement element 6 or the guide housing 1 either by

elastic members (Fig.4 a), via rolling elements (Fig.4 b) or directly (Fig.4c) take place.

The tension of the rolling elements 3 can be done with flat guide surfaces without pressure piece 2, if the Material characteristics of the guide housing or the movement element allow this. The rotation 7 can as

be formed rectangular, round or any other shape.

An anti-twist device (element 7) does not have to be arranged if:

a) the shape of the slide already ensures this (for example, prism guide) or

b) a symmetrical and opposite arrangement of a plurality of compensation devices in a guide (Fig. 5) is present. Optionally, one or more compensating means may be arranged in a guide.

Claims (2)

1. A device for automatic, local clearance compensation, regardless of the position of the slide, with movable rolling elements within Axialgleitführungen on machine tools, especially on manipulators and reversing translational units, characterized in that between the contact surfaces of the sliding freely movable and elastic members 4 tense rolling elements 3 are assigned, the rolling planes are at a certain angle to each other and the plane of the rolling elements. Second means for automatic, local clearance compensation according to claim 1, characterized in that for preventing rotation, a symmetrical arrangement of a plurality of compensation devices in a guide is required.