SU96691A1 - Field self-recording dynamometer - Google Patents

Description

The field recorder dynamometer is designed to determine the static breaking strength and elongation of tea flushes, efforts and deformation during crushing of fruits, as well as efforts to cut branches and fruits with measuring their diameter.

Dynamometers are known in which the main working element is a coil spring, working in compression or torsion, as well as testing tensile testing machines.

It is also known to use in the dynamometers transmission mechanisms for transforming linear motion into a rotary drum rotary tape recorded on a tape.

The lack of an indication of 1: devices is that it is impossible to apply their g - tests for stretching and tearing of samples that are plants rooted in the earth and located outside the device, since in these devices the sample must be fixed firmly with respect to the measuring supports.

In the described device, the possibility of attempting to break up parts of growing plants (tea flushes) located outside the device is achieved by the fact that the device mounted on a tripod next to the plant is connected to the last clip, reinforced at the end of the pivotally mounted on a fixed support of the equal-armed arm. , on the other end of which a self-recording drum is installed with a rod, a spring and a cable-and-block transmission to the handwheel, during which it is rotated manually, the strain of the test specimen with force recording and elongation on the tape drum.

FIG. 1 schematically shows a general view of the side assembly; in fig. 2 is a side view of it in a plane perpendicular to the plane of FIG. one; in fig. 3- cross-section in the vertical plane of the recorder of the instrument; in fig. 4 and 5 diagrams of the device operation during the test for crushing of 1вз1 s and sample cut.

On the base 1 of the device, a bracket 2 is fixed, in the upper end of which a ball arm 3 is installed on a ball bearing 3. Equal shoulder arm 4 is installed. At one end of the rocker arm 4 is suspended by one of its holes 5 rail 6 with clip 7 fitted with rubber jaws 8 and a retainer 9. 4 by means of axles 10 with ball bearings mounted sleeve 11, on which the drum 12 is suspended. In its own part, the drum 12 is mounted on the tubular axis 13 with the pulley 14; 1l of cable. The drum is connected to the axis 13 through the key 15 g and has the possibility of vertical movement along the axis 13, which, in turn, is in a ball bearing 16 mounted in the bracket 17.

A vertical rod 18 passes through the drum 12, having the possibility of axial movement in the guide brackets 17. Between the stem washer 19 and the sleeve 11 is placed a helical spring 20, and the end of the cable 21 is fixed to the lower end of the rod, which seizes the blocks 22, 23, 24 , pulley 14 and secured by another konzot.m on a little ball 25

On the washer 19, a movable pencil 27 was fastened with a leash 26. A stationary pencil 28 was fastened on a bracket 17.

At the right end of the rocker arm 4 there is a regulating counterweight, not shown in the drawings, to bring the device to zero force.

The base 1 of the device is mounted on a skid, having the possibility of horizontal movement in the guides of the rotator P1C of the tripod head, not shown in the drawings.

The dynamometer operates in the following manner. A device mounted on a tripod is installed next to the followed tea plant. By changing the length of the legs of the tripod and the corresponding installation of the rail 6 vertically, the required height of the clamp 7 is achieved. flush, for which the handwheel 25 is manually rotated. In this case, the cable 21 t is not down the brush, compressing the spring 20. Lastly, through the roller 11, the drum 12 is lowered, which simultaneously rotates It is the same cable 21, pulley 14 spanning the axis 13. However, the drum 12 and the sleeve 11 descends the left end of the rocker arm 4. The right end thereof is also the same value is moved upward, tension is produced flescha, okanchivayuschees its rupture. On the axially displaced and vrashayuschey drum, equipped with a paper tape, two recordings are made in the form of lines directed at an angle to the tape length: a) the magnitude of the force applied to the flush under test, determined by compressing the ground prune 20 and being written down with the rod pencil 27; b) the magnitude of the sample (flush) is equal to the vertical movement of the ends of the rocker arm 4 and the drum 12 and recorded with a fixed pencil 28.

When a flash is broken, all parts of the device take the initial position, and the lines of both diagrams make a sharp bend, the point of which corresponds to the moment of sample rupture.

In determining the force of crushing and deformation of the fruit, the pad 29 is fastened to the right end of the rocker arm 4 (Fig. 4); the fruit is trapped between it and the stationary pad 30 and the process is analogous to that described above. The value of the crush force is recorded with a pencil 27, and the amount of deformation (precipitation) of the fetus is recorded with a fixed pencil 28.

With an effort to cut the branches and fruits (Fig. 5) with knives 31 and 32, the magnitude of this force is recorded with a pencil 27, and the diameter of the cut sample is recorded with a pencil 28.

Subject invention

Claims (3)

1. Field self-recording dynamometer for detecting and recording breaking strength and lengthening tea flushes, as well as efforts to deform, crush or cut fruit or branches, using a spiral spring as a power link, and a chart drum mixed along and around as a recorder its axis through the cable block system, distinguished by the fact that, in order to test for rupture of specimens located outside the device at some distance from it, the mechanism for transferring the tensile forces and deformations of the specimen to The boron is made in the form of an equal-arm rocker arm hinged on a fixed support, at one end of which a clamp is hung to secure the test specimen, and on the other - a diagram drum mounted on a key on tubular axis with the possibility of axial movement along it. 2. Field self-recording dynamometer according to claim 1, characterized in that, for simultaneous recording of diagrams: breaking strength and elongation of the test sample, a vertical rod is passed through the diagram drum and connected to the cable assembly through the cable block system, the rod is lowered and the compressible is rotated the spiral spring, the rotation of the rocker arm connected to the test sample, as well as the lowering with simultaneous rotation of the drum. 3. In the field self-recording dynamometer on PP. 1 and 2 for determining the strain on the deformation, crushing or cutting of fruits or branches, using a pad or knife, mounted instead of a clamp on the end of the rocker arm and interacting with a fixed pad or knife. -5№ 96691 FIG. 2 15