CS266443B1 - Device for fixing deformation ring of load cell - Google Patents

Abstract

The device for fastening the deformation ring of a force sensor is intended for these sensors consisting of a deformation ring equipped with strain gauges. The device itself consists of a first basic body and a second basic body, in which circular grooves are formed for accommodating the deformation ring. The first screw for fastening the deformation ring is placed at one end in the first basic ring, the other end of which is placed in the clamping device and on which the first nut is placed. The second screw for fastening the deformation ring is placed at one end in the second basic body, the other end of which is connected to the device for sensing the measured force and on which the second nut is placed. The device for fastening the deformation ring of the sensor is usable in research institutes and control departments in almost all sectors of the national economy, for example, when measuring the friction properties of various material pairs, calibrating scales and determining the tensile characteristics of traction devices.

Description

266 443

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a device for fixing a deformation ring of a load cell.

Up to now, the strain gauge strain gauge sensor has been produced from one piece of material by die forging, including a clamping device. The second option is to weld the deformation ring with the clamping device in one unit. In the first mentioned tensometric sensor production solution, the economical and time consuming, due to the piece production and the different ring dimensions, is of great importance to the extent and accuracy of the reduced force. In the second embodiment, residual stresses and deformations after welding are produced in the deformation ring by the localized heating means. These stresses must then be removed by thermal treatment, or the entire device on the press should be leveled.

The above-mentioned drawbacks are eliminated by a device for fastening a deformation ring of a load cell comprising a deformation ring provided with strain gauges according to the invention in that it consists of a first base body and a second base body in which a circular groove is provided for receiving the deformation ring, and a first deformation sleeve fastening bolt is supported by one end in the first basic body, the other end of which is accommodated in the clamping device and on which the first nut is supported, the second bolt for the second base for the securing the deformation ring, the other end of which is connected to the device for reducing the measured force and on which the second nut is mounted.

The device for fastening the deformation ring of the load cell according to the invention is inexpensive and simple to manufacture. Such a deformation ring can be produced in this case by mounting it from a quality material with the required mechanical properties and the desired accuracy. It is also not necessary to carry out heat treatments like a sensor. 266 443

The invention and its effects are explained in more detail in the description of an embodiment according to the accompanying drawing, wherein FIG. 1 schematically shows a front view and FIG. 2 schematically shows a sectional view of a device for fixing a deformation ring of a load cell according to the invention.

The load cell comprises a deformation ring 4 provided with strain gauges 8. The device for fastening this deformation ring 4 consists of a first base body 3 and a second base body 5 in which circular grooves 9 are provided to accommodate the deformation ring 4. Oo of the first base body 3 one end 1 is provided for fastening a deformation ring 4, the other end of which is received in a clamping device (not shown) and on which the first mortise 2 is mounted. a ring whose second end is connected to a device for the sensed forces (not shown) in which the second nut 6 is mounted.

The deformation ring 4 is inserted into the annular grooves 9 of the first base body 3 and the second base body 5. In the ring grooves 9, in the case of the first base body 3, the first screw 1 and the first nut 2 are fastened. clamping device. In the annular grooves 9 of the second base body 5, the deformation ring 4 is fixed by means of a second screw 7 and a second nut 6. The opposite end of the second screw 7 is connected to a device for sensing the force or load ee and then having the side of the second screw 7 and the second basic body 5. the first base body 3 and the first screw 1 are fixed in the clamping device, the tension ring 4 becomes tensioned by the strain gauges 8.

The device for fastening the deformation ring of the load cell according to the invention is useful in research institutes and control units in almost all sectors of the national economy, for example in the measurement of frictional fluctuations of different materials, calibrations of balances and tensile characteristics.

Claims (1)

BACKGROUND OF THE INVENTION 266 443 Apparatus for fastening a proton-shaped proton · protrusion of a vessel, consisting of a deformation proton, provided with a tenso-aero, characterized in that it comprises one of the first and the second base bodies (5 and 5). in which the circular holders (9 ") are formed to receive the deformation ring (s), and the first base body (3) is housed one end of the first screw for fixing the deformation ring, the second end of which is inserted into the clamping device and onto the first aatlce (2) is placed, and the second basic body fs) is stored the second and the second irrfrfr) for fixing the deformation ring, the other end of which is attached to the device for measuring the force on which the second ace is placed.