DD229216A1 - CONNECTING ELEMENT, PREFERABLY FOR TESTING MACHINES - Google Patents

Abstract

The invention relates to a connecting element for backlash-free connection of assemblies, for example using a single threaded elements shared threaded sleeve, which is pressed by means of a pressure ring on a threaded pin. According to the invention are the elements of the threaded sleeve 3 flexural elastic and their radii r-1 u. r-3 is greater than the radius r-2 of the threaded pin 6 and the radius r-4 of the pressure ring 4, so that the elements press so from their middle beginning ganzflaechig to their maximum Anschlußflaechig. Fig. 1

Description

Field of application of the invention

The invention relates to a connecting element for backlash-free connection of modules provided with connecting pins as puncture and adaptation elements, such as test cylinders, load cells, joints, bending and tension rods and the like, preferably for testing machines.

Characteristic of the known technical solutions

Especially in vibration testing machines with varying test forces in different directions, a precise play and strain-free connection of the assemblies with each other or with the testing machine, for all load cases to be applied during the test, is required.

These grippers, or gripping heads and fasteners for testing machines are known in which as in the solution according to SU 624 139 »plungers in the form of jaws or split threaded sleeves are pressed by a mounted pressure ring with formachlüssiger conical Innenborhung on the terminal pin of a module.

Due to the unavoidable manufacturing tolerances of the elements to be joined, only an insufficient areal compound is achieved for example in the threads of a connecting pin, so that for safe power transmission, a corresponding oversizing is required, or the required test quality is not achieved.

Object of the invention

The aim of the invention is a connecting element, preferably for testing machines, which allows a secure transmission of the test forces despite minimal size.

λ I. η η ι η ι f ~. · - -

Explanation of the essence of the invention

The object of the invention is to improve significantly by appropriate design of the individual parts of the connecting element, the planar connection with the terminal pin of an assembly or a testing machine.

This is achieved according to the invention by individual parts of the connecting element, for example in the form of individual elements of a split threaded sleeve in its rotation line are flexurally elastic and their common inner radius is greater than the radius of the connecting pin of the modules or Prüfmaschine \, and their common outer radius is greater than that mean inner radius of the pressure ring is.

In this way, put on the mounting of the pressure ring, the individual elements of the split threaded sleeve from its center starting increasingly firmly around the connecting pin to their maximum pads and thus make optimal use of these.

embodiment

At ein.em embodiment, the invention will be explained in more detail. Show it

"Pig. Ti Connection element for connection of modules%, with threaded pin to a splined connection

^J Pig. 2: Cross-sectional design of the individual parts of the connecting element

The main body 1 of the connecting element according to the Pig. 1 is placed on a planer connection 2 of a testing machine. On the base 1 is based directly from an axially divided threaded sleeve 3, which is tapered in the lower region of its diameter conical. However, the wall thickness is still so great in the region of the conical taper that the test loads occurring are transmitted without stretching the split threaded sleeve 3. About the conical portion of the split threaded sleeve 3, a pressure ring 4 is arranged with a corresponding conical inner bore. The pressure ring is with several clamping screws 5, which in the plansch connection

2 are screwed directly, pulled on the split threaded sleeve 3, whereby it is clamped both axially against the base body 1 and thus the flange 2 as well as radially against the threaded pin 6 of the module to be connected.

To ensure a maximum areal connection, the individual elements of the split threaded sleeve 3, which act like clamping jaws, are flexurally elastic in their common rotation line. Furthermore, according to the pig. 2, the common inner radius r-1 of the elements of the split threaded sleeve 3 is greater than the radius r-2 of the threaded pin 6 and the common average outer radius r-3 of the elements of the split threaded sleeve 3 is greater than the mean inner radius r-4 of the pressure ring 4th Now, if the pressure ring 4 is pulled over the split threaded sleeve 3 with the aid of the clamping screws 5, so put the individual elements of the split threaded sleeve

3 starting from its center increasingly around the threaded pin 6 to its maximum pads. This is achieved, as long as due to the flexurally elastic deformation of the individual elements of the split threaded sleeve 3 their common average outer radius r-3 is not equal to, or not smaller than the mean inner radius r-4 of the pressure ring 4. When releasing the pressure ring 4, the individual elements of the split threaded sleeve 3 again take their Ausgangskurwürungsradius.

Claims (2)

claim 1. Connecting element, preferably for testing machine, for the backlash-free connection of assemblies, such as test cylinders, load cells, joints, bending and tension rods and the like, provided with connecting pins, for example in 3 mm of threaded pins, and the like, for example using a single element split threaded sleeve, which is pressed by means of a pressure ring on a threaded pin, characterized in that the individual elements of the split threaded sleeve (3) are flexurally elastic in their rotation line and their common inner radius (r-1) is greater than a radius (r-2) of the threaded pin (6) of the assembly or testing machine and their common mean Outer radius (r-3) is greater than a mean inner radius (r-4) of the pressure ring (4). For this 2 sheets of drawings