SU657475A1 - Electric switch actuator - Google Patents

Description

3 The aim of the invention is to increase reliability and durability by eliminating hard impact. The goal is achieved by the fact that the locking device of the actuator is made in the form of a four-axle-1 hinged crank-beam mechanism, equipped with at least one eccentric bushing, which can be rotated in opposite directions for jamming and releasing the movable drive of the actuator associated with. an eccentric crank of the specified four-link channel. The eccentric bushing is installed in the hinge of the oscillation of the four-link mechanism's rocker — and is spring-loaded with a reversing spring action element. ya fig. 1 shows a general view of the water; FIG. 2 shows the on position of the locking device and the drive elements (static); in fig. 3 shows the position of the locking device and the drive elements in the initial moment of release of the locking device from the switched on position of the drive; in fig. 4 - position of the locking device and the drive elements in the process of shutting down the drive (the locking device goes to the locked position); in fig. 5 disabled position of the locking device and drive elements (static standing); 6) - the position of the locking device and the drive elements at the initial moment of the release of the locking device from the open position of the drive; Fig. 7 shows the position of the locking device and the drive elements in the process of switching on the drive (the locking device is ideal for the locked position). On the etallic frame 1 (see Fig. 1), which is the drive housing, the bearings of the switch 2 and the drive shaft 4, the drum 5 of which is engaged in the switch shaft with an eccentric mechanism consisting of an eccentric crank 6, a connecting rod 7 mounted on said eccentric using a pinch (not shown in Fig.) And lever 8. The drive has a spring energy carrier, the operating springs 9 of which are located inside the drum 5 and are connected at one end to the indicated drum, and others - with the drive shaft 4. Ba Aban SET flax 5 on the drive shaft 4 by means of bearings (in. Fig. not shown). The drive is equipped with automatic and manual devices for winding the working springs, each consisting of a gearmotor 5 10 (see Fig. 1) and an overrunning roller clutch, the inner race 11 of which is rigidly connected to the shaft 4, and one of the outer sleeves 12 is connected with the lever of manual winding of the drive (not shown in the figure), and the other 13 with the output eccentric shaft (not shown in the figure) the gearmotor. In order to fix and hold the movable working body (in this case, drum 5) in the On or Off positions, a locking device is used, implemented as a four-bar hinged crook-type-rocker mechanism using an eccentric as a crank. This mechanism connects the drum 5 with a fixed axis 14 (located on the drive frame) and consists of an eccentric crank b (which simultaneously serves to transmit movement from the energy carrier to the switch shaft :), the connecting rod 7 and the rocker arm 15, the oscillation axis 14 of which is eccentric a sleeve 16 installed relative to the axis 14 and the rocker arms 15 on needle bearings 17 and 18. The eccentric sleeve, in turn, is equipped with a self-aligning lever consisting of a lever 19 rigidly connected to the specified sleeve, and a lever hook 20 reverse -acting. The said hook has a groove resting at one end on the fixed axis 21 of the lever 19 and allowing radial (relative to axis 21) movement of the lever hook springed to the same axis by the spring 22, the second end of which is fixed to the axis 14. The axis 21 also serves as the axis of oscillation of the lever hook having, in addition to the groove of the groove, a semi-cylindrical cavity, two symmetric (relative to the cavity) inclined profile 23 and a shank 24, the lever 19 is spring-loaded with a torsion spring 25 (see League, 1) to the rocker arm 15 in such a way that the axes of the sigimetry self-coupling lever and the beam la combined and semi-cylindrical cavity coupled with roller 26 of the rocker arm. In FIGS. 1-7, the following notation is adopted: L is the resulting center distance between the axis 4 of rotation of the crank cam eccentric and the axis of the bush 16 of the rocker arm 15, the center-to-center distance from the crank eccentric shaft 4, to the axis of the eccentric oscillation shaft 14 bushings 16 P, - the length of the eccentric crank 6 Sj - the length of the connecting rod 7; j is the length of the rocker 15, d is the eccentricity of the eccentric BUSHING 16, moreover, S.2t. The operation of the described drive occurs as follows. Eccentricity DE eccentric tulku 16 corrects the value between

center distance 1, increasing or decreasing it by the amount of eccentricity:

e-1de 1

Thus, the four-link hinge of the crank-type-cortex mechanism (and, accordingly, the locking of the movable working organ of the drive, i.e. drum 5) is achieved in two final positions of the rocker arms 15, the angle of oscillation of which is / vlSO: 1) + t i +., which occurs when L and corresponds to the position of the actuator On (see Fig. 2); 2) i + ,, L + Kj, which takes place when L s 2k 6 iT corresponds to the position of the drive Disabled (see Fig. 5).

To disconnect or turn on, it is necessary to start working springs, which can be done manually with a reciprocating action on the lever of the outer cage 12 of the overrunning clutch, or by an automatic winding device, and the drum 5 of the drive shaft is held by the locking device. After starting up the spring springs, the drive is ready to perform shutdown operations and turn on the switch.

Turning off and switching on is carried out by rotating the drum 5 through an angle of 180 °, respectively, of each operation due to the potential energy accumulated in the spring energy Tele | when acting on the shank 24 of the lever hook 20, respectively, counterclockwise (see FIG. 2) and clockwise (see FIG. 5), respectively, using the off or on buttons (not shown in FIG.), or the corresponding remote control elements (not shown in FIG.). The lever is rotated in the corresponding direction (see, respectively Fig. 3 and Fig. 6) while simultaneously radially displacing it from the axis 14. R is the result of the subsequent disengagement of the self-aligning lever with the rocker roller 26 and under the influence of the rotating moment of the operating springs 9, the four-star articulated spindle mechanism takes this position (see FIG 3 and 6) when eccentricity l of eccentric sleeve 16 does not affect the size of the center-to-center distance 1 (the eccentricity is perpendicular to the center-to-center distance) —L.

Due to the fulfillment of the condition of the release mechanism of the locking device: e + e. 3, a shut-off operation is performed (see Fig. 4) or a switch-on operation (see Fig. 7), with the roller 26 turning the rocker 180, respectively, counterclockwise or clockwise the arrow overtakes the self-locking lever disengaged and spring-loaded with it, the inclined profile 23 of the lever hook is deflected by the said roller with the release of the said hook from the axis of the rocker arm, as a result of which the self-linking lever engages with the rocker arm the result of the mutual alignment of the roller 26 with the semi-cylindrical hollow of the lever .. grip. Due to the satisfaction of the locking mechanism spell conditions:

e - -e L-fCj, pr-and ь-е-и and, п / л and: е1-de

the drive locks, respectively, in the disconnected position (see Fig. 5) or in the switched on position (see Lig. 2) at the ends of the oscillating positions on the angle 18O of the rocker arm 15 corresponding to each turn of the drum 5 one half turn. The on-off full cycle is performed by turning the drum 360 °. At the same time, the rotation of the drum is converted into an oscillatory motion of the switch shaft 3 by the action of the same i-unit 7 eccentric 6 on the lever 8 of the switch shaft and is ultimately transmitted to the mechanisms of the arcing devices with the help of levers and dielectric plugs (not shown in Fig. ).

Lormula invention

Claims (3)

1. A spring-operated electric switch actuator containing an energy carrier with working springs and a device for charging them, a movable working member connected by means of an intermediate gear, such as an eccentric switch, to the switch shaft and a locking device different from that to increase reliability and durability due to the elimination of hard impact, the specified locking device is made in the form of a four-bar hinged crank-koroglislovogo mechanism, equipped with at least one eccentric w street with the possibility 0 its rotation in opposite directions for the casting or thrashing of the movable working body of the drive connected with the eccentric crank of the said four-link mechanism, 2. The actuator according to claim 1, that is, 5 and 5 with the fact that the eccentric sleeve is installed in the L4ap four-link mechanism of the rocker arm and is spring loaded with a spring element of the reverse action. 3. Drive on PP. 1 and 2, which is characterized by the fact that the eccentric sleeve is provided with a self-aligning joint, the interaction Sewing off the crust, 1 by means of the alignment of mutually-spring-loaded roller and groove. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 278080, cl. H 01 H, 33/40 1967. 2. USSR author's certificate 175999-, cl. H 01 I, 33/40 1964, LL til. t3