SU1578530A1 - Device for determining mechanical characteristics of torsion springs - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is to simplify and improve the measurement accuracy. When determining the mechanical characteristics, the spring 7 is installed between the leading and the driven spindles 3 and 4 on interchangeable leads 5 and 6. After squeezing the brake 11 pressed by the spring 12, rotating the handle 10 loads the test spring 7. When the driving spindle 3 rotates, torque is transmitted through the test spring 7 on the driven spindle 4 and then through the flexible coupling 14, which is wound on the pulley 3, loads the dynamometer 15. The driven spindle 4 rotates when measured by an amount proportional to the displacement of the dynamometer rod 15. The angle of rotation The spindle 3 is equal to the sum of the angles of rotation of the driven spindle 4 and the tightening of the test spring 7, i.e. Both spindles rotate in one direction, but rotate at a different angle. This difference is the angle of twist of the test spring, which is measured by moving the arrow 9 installed on the master spindle 3 relative to the scale 8 mounted on the driven spindle 4. The torque measurement is reversed using the block 17. 2 Il.

Description

The invention relates to a measurement technique and can be used to determine the mechanical characteristics of torsion springs when tested.

The purpose of the invention is to simplify the device and improve the measurement accuracy.

On league. 1 shows the proposed device; on league. 2 - torque meter.

The device contains two racks 1 and 2, in which the leading 3 and the driven 4 spindles with interchangeable leads 5 and 6 are placed, between which a spring 7 is installed, which is not a driver, a spring twist meter consisting of a scale 8 fixed on the driven spindle 4 and arrow 9 mounted on the leading spindle 3 having the handle 10, the leading spindle 3 is equipped with a brake 11 with a spring 12 mounted on a rack 2, a torque meter consisting of the pulley 13 is rigidly set on driven spins Barely 4, a flexible link 14, a dynamometer 15, mounted on a rack 16 and calibrated in units of torque, and a block 17, providing measurement reversal and consisting of a pulley freely rotating on an axis rigidly mounted on a rack 16. All nodes are located on a common plate 18.

The device works as follows.

When determining the mechanical characteristics, the spring 7 is installed on the centering mandrel of the interchangeable leash 5 between spindles 3 and 4. The end coils of the spring are mounted on special stops of the interchangeable leashes 5 and 6 located at the ends of spindles 4 and 3, respectively. After depressing the brake 11 pressed by the spring 12, by rotating the driving spindle 3, the test spring 7 is loaded by the handle 10. When the driving spindle 3 rotates, torque is transmitted through the test spring 7 to the driven spindle 4 and then through the flexible link 14, which is wound onto the pulley 13 , loads the dynamometer 15, calibrated in units of the moment. The graduation in units of time is obtained by multiplying the available linear force graduation by the radius of the pulley 13. The slave spindle 4 when measuring

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rhenium rotates by an amount proportional to the movement of the rod, n of the dynamometer 15. The rotation angle of the driving spindle 3 is equal to the sum of the angles of rotation of the driven spindle 4 and the tightening of the test spring 7, i.e. Both spindles rotate in the same direction, but rotate at a different angle, and this difference is the angle of twist of the test spring. This angle is measured by moving the arrow 9 mounted on the master spindle 3 relative to the scale 8 mounted on the slave spindle 4. To record the measurement results, release the brake 11 and fix the master spindle 3 "to hold the whole system in a predetermined position.

FIG. 2 shows a torque meter. The torque measurement is reversed with the block 17. When the pulley 13 rotates to the right (FIG. 2), the flexible link 14 winds up onto the pulley 13, bends around the block 17 and loads the dynamometer 15. When the pulley 13 rotates to the left, the flexible link 14, winding onto the pulley 13 loads the dynamometer 15 directly, by block 17. To increase the measuring range and maintain the required accuracy of the torque, two dynamometers with different measuring limits are used. 11p using the dynamometer, the end of the flexible connection is swapped from one dynamometer to another, skipping the flexible connection 14 on the other side of block 17, while the measurements are carried out in a similar way

Claims (1)

Invention Formula A device for determining the mechanical characteristics of torsion springs, comprising a base with three columns, located in the first and second columns leading and driven spindles, between which a spring is installed, a handle connected to the driving spindle, a torque meter, a twist angle meter, made in the form of a scale mounted on the driven shaft, and an arrow, characterized in that, in order to simplify and improve the measurement accuracy, it is equipped with a pulley, a reversing unit and a brake with a spring, wherein ormoz five with a spring V4 of the GLNOVGTRNY on the first stoic, with the hot-water meter of the twist angle meter located on the drive shaft between the spring and the first stand, and the torque meter is made in the form of dynamos 11 L  GO6 a meter installed on the third stand, and a span with a driven shaft through a reversing unit mounted on the third rack, and a pulley located on the driven shaft by means of a flexible link. 15 15 Fig 2