SU1760416A1 - Device for securing string of frequency transducer - Google Patents

Abstract

Usage: in instrumentation engineering, namely, in pressure, force and other sensors. Summary of the invention: one end of the string 3 is fixedly mounted on the body 1, and the other is installed in the clamping parts of the liner 4, after which sleeve 2 with the washer 7 is put on emphasis in the recess of the housing 1. The protrusion 6 of the liner is placed in the groove of the housing. Rotating the sleeve 2 causes the insert 4 to move in translation, which leads to tension or weakening of the string 3. 1 sludge.

Description

The invention relates to a measurement and measurement technique and can be used in frequency sensors for pressure, force, displacement, and other parameters.

In the known frequency sensors, the string fastening device is made in the form of a body and a clamp (collet, plate) (see, for example, the book of Mylokhin N.T., Frequency sensors of autocontrol and control systems, M: Energy, p.48-52, fig. 2-15, 2-16,2-17).

The disadvantage of these fasteners is the lack of reliable sealing of the ends of the string v, the lack of a smooth adjustment of its length.

Also known are devices for fastening a string of a frequency sensor with a fingerboard and a roller, in which, along with the fastening of a string, it is possible to adjust its length and tension (see, for example, US Patent No. 3478594. Cl. G 01 L9 / 00, 1969).

A disadvantage of this device is also not sufficiently reliable embedding of the end of the string, since creeping out of the string occurs.

The closest in technical essence to the proposed device is a device for fastening a string of a frequency sensor according to star number 434288, cl. G 01 L 11/00, 1972.

The disadvantage of this prototype is that, at sufficiently large loads, the string is pulled out of the clamping inserts, which does not allow to smoothly adjust the tension of the string.

The aim of the invention is to increase reliability by increasing the stabilization of string tightening.

The goal is achieved by those. that in the device for fastening the string of the frequency sensor, comprising a housing, an adjusting sleeve and a string placed between the two parts of the liner, fastened together, along the same axis, while the surfaces of the parts of the liner facing the string are made protrusions of one part

(L

WITH

4 o o o

the liner is placed in the hollows of the other, the outer surface of the liner is cylindrical, the liner is placed in the axial hole of the adjusting sleeve and connected to it along the thread, the sleeve is fixed to the housing, and the end of one part of the insert is made with a protrusion placed in a groove made on The inner surface of the body is parallel to the string.

This set of essential features in comparison with the prototype will allow the creation of frequency string sensors with higher metrological characteristics due to the stabilization of string stitching.

The drawing shows a device for securing a string of a frequency sensor in section.

The device has a body 1, an adjusting sleeve 2 and a string 3 mounted along a single axis. The string is fixed between two parts of an insert 4 placed in the axial hole of the adjusting sleeve and fastened to it along the thread. The surfaces of the parts facing the string are made with a tooth-like profile, with the protrusions of one part of the insert placed in the depressions of the other. Both parts are fastened together by a threaded joint 5 and form a cylinder, on the external surface of which a thread is made. At the end of one part of the liner there is a protrusion b placed in a groove made on the inner surface of the body parallel to the string. An adjusting sleeve is installed in the recess of the body and fixed in it by means of a clamping washer 7 and screws.

Before fixing the string 3, depending on the required length, its free end is mounted in the clamping parts of the liner 4 with the removed sleeve 2. Then it is stretched and crimped by means of the threaded connection 5 to the liner teeth profile. Thereafter, an adjusting sleeve with a washer 7 is screwed onto the cylinder formed by the liner parts up to the stop of the housing 1,

Washer 7, leaning against the collar of the sleeve,

Pre-fastened with a gap of screws (not shown in the drawing) to the device body. In this position, further rotation of sleeve 2 causes translational (along the axis of the sleeve) movement of the threaded cylinder, and this in turn leads to tension or weakening of the string. After adjusting the tension of the string, the washer 7 with the aid of the mentioned screws tightens the sleeve by tightening them. Arbitrary rotation of the threaded cylinder with the sleeve clamped is eliminated by the protrusion 6 placed in the housing groove. Thus, the preliminary stretching and crimping of the string by the toothed profile of the insert placed in the axial bore of the adjusting sleeve completely eliminates the creeping of the string at different tension.

Claims (1)

Invention Formula A device for attaching a frequency sensor string, comprising a housing, an adjusting sleeve and a string placed between two parts of the insert fastened together on one axis, with the surfaces of the parts of the insert facing the string being made with a tooth-shaped profile and the projections of one part liner placed in the hollows of another, distinguishing so that, in order to increase reliability by increasing stabilization of the tightening, the outer surface of the liner is cylindrical in it, the liner is placed in the axial hole of the adjusting bushings and is connected to it by threads, the bushings are mounted on the housing so that they can be fixed, and the end of one of the parts of the insert is made with a protrusion placed in a groove made on the inside body surface parallel to the string.