SU625144A1 - Transmission - Google Patents

Description

The invention relates to instrumentation, in particular to gears used in gauge-type devices, and can be used in devices requiring control of the gear ratio.

In the known gears consisting of the pull and the driven link, the size of the adjustable link (the distance from the axis of rotation of the pointer of the indicating device to the longitudinal axis of the link) can be changed only to certain values, φ) divided by the specific design of the device, and therefore It is impossible to change the gear ratio in a sufficiently wide range.

Therefore, for example, for an instrument with elastic sensing elements, moving measured environmental parameters, either various transfer mechanisms or different elastic sensitive elements are needed (so that the entire scale of the device remains working (2 .;

The closest in technical essence to the present invention is a drive mechanism for pressure gauges, consisting of a thrust and a driven link, transmitting the movements of an elastic sensitive element to the axis of the pointing arrow. At the movable end of the sensing element, a hinge is pivotally attached, a shaft moving into motion, which, in turn, is connected to the crank by means of a slot, and thereby converts linear movement of the rod to the crank.

This transmission mechanism allows the adjustable link size to be varied to a limited extent, which narrows the measurement range. By changing the magnitude of the adjustable link, you can change the gear ratio over a fairly wide range, t, e, you can achieve the same stroke of the pointing arrow with different values of the measured parameter (with equal progress of the sensing element). Thus, by changing the gear ratio, you can adjust the measurement range.

The purpose of the invention is to expand the measurement range.

Claims (2)

This is achieved by the fact that the slave link is made in the form of a bracket with ears connected by a screw, on which is placed a nut-slide, pivotally connected to the rod, while the croitztein is rigidly attached to the axis of rotation of the arrow and its ears are located above this axis, outside its zone. The proposed design of the transfer mechanism allows the link of the link peryjrapyeMoio link beyond the axis of rotation of the arrow along its head, so that the axis does not prevent the change of the size of the link being adjusted. The drawing shows an ericke diagram of the mechanism. The transmission mechanism consists of a ti 1 and a follower link, including bracket 2, a screw 3 fixed in the ears of bracket 2, and a slider nut 4, which can move along the entire length of the screw 3. Krogtscheteny 2 is pointed out on the axis of the rotation of the pointing arrow 5, thanks to which means that the slave link is not fixed to the axis 5, at the same time, the ears of the kx) nstein 2 are beyond the limits of axis 5. T hectare I at one end is sharpened with an elastic slingshot 6, and the other with a slider nut, 4. mehash {sm ra & T he i, transferring the displacement at the other sensitive element 6, rotates the driven link and the axis 5. To change the size of the adjustable link E, it is necessary to turn {screw 3 into kKjifl or cTopojry. At the same time, the nut-noel 4 of the gun will move 1) the syllable about the entire length of BiiKra 3, which ensures the niotloS size 2 (size of the adjustable link) from the axis 5 to the longitudinal axis of the ha, BiJDioTb up to t From the axis 5, I change the direction of rotation of axis 5, when it decreases and the size of the route link increases the gear ratio, because the ear of the driven link increases, and together with the next, the angle of rotation of the rotation axis 5 of the pointing arrow, i.e. . increases the stroke / ngdavas of the latter with the same course of the elastic sensing element 6; as the size of the adjustable link increases, the gear ratio decreases in proportion. Thus, the adjustment of the range is ensured. Moreover, since the size of the adjustable link can vary up to E equal to zero, the gear ratio of the mechanism loses to vary practically within unlimited limits. The transmission mechanism of the proposed design allows the use of a single elastic element in a wide range of different measurable parameters (for OD1YM and the same transmission mechanism), in other words, manometric instruments with a predetermined transmission mechanism can be used for measuring parameters within the possibilities of an elastic sensitive element. The invention of the gear mechanism, mainly given to manometric instruments, containing a driven link and a driven link, 11th the drive of the neck axis of the arrow of the ircbar during rotation, and with the fact that, with the aim of improving the range of measurement, it has a driven The link is made in the form of a crozi mystery with ratchets connected by a screw on which the nut-slider is placed is connected {with a rod, while the krogoltein is rigidly attached to the axis of rotation of the arrow and its rails is located; they are south of this axis, outside its tones , Sources of information brought to attention Spurtize: 1. USSR author's certificate N 4i 6583, y. G 01 L} 9/00, 1972. 2. Putsg USA No. 22377755, cl. 73-432, .1947.