SU741237A1 - Automatic device for monitoring forces of switching apparatus springs - Google Patents

Description

The invention relates to electrical equipment and can be used in all sectors of the national economy / where mass control of microswitches is required. The known efforts to control the direct and reverse operation of the microtransmitters with the help of reference weights and devices designed to control the forces of the cylindrical compression springs. However, these devices cannot provide mass control due to their low productivity and considerable laboriousness. Spring control automata are also known that contain a loading device, a drive device, a feed mechanism associated with a measuring unit containing a spring-loaded rod, which is installed in housing 2. These devices cannot be used to control microswitches. The purpose of the invention is to provide control of the springs of the microswitches. To achieve this goal, the automatic device for controlling the springs of switching devices contains a loading device, a drive device, a feed mechanism associated with a measuring unit containing a spring-loaded rod which is installed in the housing, the feed mechanism is in the form gutters with a contact and feed rail with dogs and a rocker mechanism installed with the ability to interact with the feed rail, and the meter The second block is equipped with two other spring-loaded rods, each of which is installed in a separate housing, all the rods are installed in a row, with one of the spring-loaded rods mounted to interact with the microswitch spring, and two yes are rigidly connected to the hinges of the spring-loaded rods . FIG. 1 schematically shows an automaton; in fig. 2 is a diagram of the measuring unit in FIG. 3 is a side view of FIG. one; in fig. 4 - electrical schematic diagram of the control and inspection of the tested microswitches; in fig. 5 is a diagram of the tested microswitch in the initial position.

The circuit of the automatic device for controlling the efforts of the springs of switching devices contains a loading device 1, a feeding mechanism consisting of a rocker pair 2 and 3, rails 4 with paws 5-7, making reciprocating movement along the jalba .8, shaft 9 (Fig. 3), sec. cams 10-12 and pulley 13, pusher 14, lever 15, contact node 16 with contacts 17 (fig. 1) 18 and 19, measuring unit 20, made in the form of three identical sections 2 (fig. 2) 22 and 23, each of which consists of a cap 24, petals 25 and 26 (27 and 28 are the second section, 29 and 30 are the third section), cap 31, body 32, The cap 33 (cap 33 between sections 21 and 22, as well as between sections 22 and 23 is one monolithic part with cap 24), insulating sleeve 34, spring-loaded rod 35, reference spring 36, adjusting sleeve 37 and sleeve 38, the drive unit (fig 1), which includes the motor 39 and the gearbox 40; the tested microswitches 41, 4 valve 43, relay K1 - CE (FIG. 4), electromagnet (EM), switch (S1).

The machine works as follows.

Driving device 39 and 40 (Fig. 1) through the rocker pair 2 and 3 reports the reciprocating movement of the rail 4 with dogs 6 and 7, which provide step movement of the tested microswitches coming from the boot device 1 into the chute 8.

After the next microswitch 41 is installed in the test position: the drive unit, consisting of the motor 39 and the gearbox 40, by means of a gear (chain or V-belt) transmits rotational motion to the pulley 13, which is rigidly connected to the shaft 9 (Fig. 3) and the cams 10, 11 and 12. When the cam 11 rotates through the pusher 14 and the lever 15 leads the contact assembly 16 with contacts 17, 18 1 19 to the contacts of the tested microswitch 41 (Fig. 1), and the cam 12 (Fig. 3) brings the measuring block 20., to the drive rod of the tested microswitch tel 41 (Fig. 1) and presses it. ,

The magnitude of the efforts of the reference springs 36 (Fig. 2) is adjusted by adjusting sleeves 37 in each section (for example, in section 21 the minimum value of the reverse

trips, in section 22 at least direct triggers and in section

23 at maximum forward operation). In the initial position between the petals 25 and 26 of section 21, the petals of 27 and 28 of section 22 and the petals

29 and 30 of section 23 there are closed electrical circuits, since the rod 35 is screwed into the cap

24 under the action of a reference spring, tightly pressed against cap 31 and

thereby ensuring reliable

electrical contact. Petals 25–30 and pins 17–19 of the contact assembly 16 are included in the circuit as shown in FIG. four.

5 During the forward movement of the measuring unit (Fig. 2), the electrical circuit between the blades 25 and 26 opens in the first place and thereby terminates the power circuit.

0 winding short circuit relay (Fig. 4), which drops and closes the power circuit of the relay winding KB. Relay KB triggers and, with its contacts, blocks itself and prepares the power supply circuit.

5 winding relay K9.

Under the condition that the closing contact of the tested microswitch is locked before the circuit is opened between the blades 27 and 28 of section 22, i.e. the force of the reference spring adjusted to the minimum allowable value of the direct actuation will be greater than the actual minimum value of force y then, the K1 relay (Fig. 4) will work earlier, the K4 relay will disappear and the K1 relay contacts and the K4 relay in the power supply circuit of the winding of the defective K7 relay will simultaneously be closed and the K7 relay will operate and its contacts will self-block Turns on the power supply circuit of the EM actuating electromagnet, which is triggered and opens the flap 43 (FIG. 3), which allows the microswitch to be tested to fall into the hopper for

reject (hopper not shown). With the further course of the measuring unit, if the electrical circuit between the petals 29 and 30 (Fig. 2)

0 is opened before the opening contact of the microswitch is opened, i.e. reference spring force adjusted to maximum permissible value

5 the direct actuation will be less than the actual force of the direct actuation of the tested microswitch, then the relay K2 (Fig. 4) will work before the relay K5 has time to fall off and break the winding power circuit

0 relay K8 and thus relay K8

It will also activate itself with its contacts, self-blocking and closing the power supply circuit of the winding of the actuating electromagnet EM, after which the described cycle repeats.

During the reverse course of the measuring unit (if the microswitch under test is not rejected by the two previous parameters), the circuit between the lobes 25 and 26 should open first (Fig. 2). If the opening contact of the tested microswitch returns to its original position, i.e. closes the power circuit of the winding of the relay K2 (Fig. 4) earlier than the chain breaks between the blades 25 and 26 (Fig. 2), therefore, the actual minimum repressing force of the tested microswitch will be less than the force of the reference spring 36, then at the moment of contact closure of the relay K2 (Fig. 4), the contact of the short-circuit relay will still be closed, therefore, the relay K 9 will operate and with its contacts self-block and close the power supply circuit of the operating electromagnet EM. Then the cycle repeats.

Claims (2)

1.Sakharov P.V., Selnin V.I. .Technologies and equipment for the production of electrical apparatus, M., Energie, 1972, p. 208-209, fig. 11-6, 2. Authors certificate of the USSR 537266, G01L 1/04, 1975. 3f 25 fZ6iSX 32 35275 /