SU270306A1 - LOW FREQUENCY VIBROSTAND - Google Patents

Description

Low frequency vibrating tables are known that contain a drive shaft, a frame mounted on it, with ends located at its ends with a possibility of adjusting the distance from the axis of the drive shaft with a counterweight and a ball, which is kinematically connected to the drive shaft and carries a beam, at one end of which is adjustable the distance from the shaft axis of the beam is the shaft carrying the test table, and on the other the counterweight, and the dual planetary gear, kinematically connecting the drive shaft with the shaft carrying the test table.

The proposed vibrostand differs from the well-known one in that it is equipped with two anti-parallelogram mechanisms, one of which connects the shaft of the beam with a counterweight located on the frame, and the other - the shaft of the beam with the shaft of the test table and fixed against displacement along it and the dual planetary gear is made with flexible connections. These differences allow you to automatically balance the system in the process of adjusting the amplitude of oscillations.

Another difference of the proposed shaker is that it is equipped with a counterweight displacement drive along the frame. In addition, the proposed shaker is characterized in that the counterweight is located on the beam.

made in the form of a test table, identical to the test table located at the other end of the beam. The drawing shows the kinematic

shaker circuit.

On the drive shaft L planted on the fixed axle 2, the frame 3 is installed with the ends positioned at its ends with the possibility of adjusting the distance from the axis of the drive shaft

the counterweight 4 and the shaft 5 in the support 6. The shaft 5 carries the beam 7 fixed on it. On the beam there are installed two supports S and 9 in which the shafts 10 and // are located.

The shafts 10 and 11 carry two identical test tables x and 12 and 13. The shafts 1, 5, 10 and // are connected kinematically with each other by means of a dual planetary gear set made with flexible couplings.

The transmission includes an asterisk 14, rigidly mounted on the axis 2, asterisks 15 and 16, rigidly mounted on the shaft 5, asterisks 17 and 18, rigidly mounted on the shafts, respectively 10 and 11, lower day 19, tying the asterisks 14 liters 15 to two top chains 20

and 21 linking a double sprocket 16 with

asterisks 17 and 18. All three chains pass

The bani serve for the anti-parallelogram mechanism, one of which is 23, connects shaft 5 of beam 7 with counterweight 4, and the other 24, connects same shaft 5 with supports S and 5 test tables.

Works shaker as follows.

When the frame 3 rotates from the drive motor 25, the lower chain 19, rolling around the sprockets 14 and 15, the shaft 5 of the beam 7 rotates. When the beam 7 rotates, the upper chains 20 and 21, rolling round the asterisks 16, 17 and 18, result test tables 12 and 13 are rotated. The gear ratio of the sprockets 14 and 15, constituting the lower planetary gear, is 0.5, and the gear ratio of the sprockets 16 and 17 and 16 and 18, constituting the upper planetary gear, is 2, and this ensures 12 and 13 test linear axial back and forth motion with angular th speed equal to zero.

The counterweight 4 eliminates lateral loads on the vertical axis 2. For smoothly adjusting the amplitude of the shaker, any of the shaft supports of the test tables, for example, 8, is rigidly connected by the stopper 26 to the center of rotation of the frame 3. The counterweight displacement drive consisting of an electric motor 27, a screw 28 and the nut 29 mounted in the counterweight allows the latter to be moved along the frame 3.

Simultaneously with the displacement of the counterweight 4, the support 6 supported by the lower anti-parallelogram mechanism 23 moves, carrying shaft 5 and the beam 7. Moving the beam 7 with the fixed support 8 causes the test table support 9 to move through the upper anti-parallelogram mechanism 24

13. The distance between the test tables is equal to the amplitude of the shaker.

Prev Invention

Claims (3)

1. Low-frequency vibration table, containing a drive shaft, mounted on it ral1u with ends located at its ends with the possibility of adjusting the distance from the axis of the drive shaft and a shaft that is kinematically connected to the drive shaft and carrying a beam, at one end of which is adjustablely adjustable distance from the shaft axis of the beam, a shaft carrying the test table, and on the other a counterweight, and a dual planetary gearbox, kinematically linking the hydraulically driven shaft with the shaft carrying the test table, characterized in that in order to automatically balance the system in the process of adjusting the oscillation amplitude, it is equipped with two anti-parallelogram mechanisms, one of which connects the shaft of the beam with a counterweight located on the frame, and the other - the shaft of the beam with the shaft of the test table and with the counterweight located on the beam and fixed against displacement along it, and the dual planetary gear is made with flexible links. 2. The low-frequency vibration table of claim 1, characterized in that it is provided with a drive for displacing the counterweight along the frame. 3. The low-frequency vibrostand according to claim 1, implying that the counterweight located on the beam is made in the form of a test table identical to the test table located at the other end of the beam.