SU704722A1 - Device for automatically cutting off the feed - Google Patents

Description

(54) USTRSHTYOOY YUYVT O1№TYCH VYVE «1ENYA

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wheel 8, kinematically associated with the mechanism of translational peremegde-. SRI caliper (not shown). To the drive gear 4, the worm to 7 is raised by a spring 9 placed; between the thrust sleeve 10 and the glass 11, mounted on the flange 12, mounted on the shaft 1, with vozmbZhNststya adjusting (adjusting) movements. In the radial through holes of the flange 12 there are balls: 13, which averagely (turned on) the positions of the screw 7 in the V-shaped ring groove 14 when exposed to an internal pressure cone 15, which is made in glass 11. On the opposite side of the shaft 1 Two-way clutch 16 and intermediate clutch 17 are installed with the possibility of axial movements. The double-sided clutch 16 is connected to the drive gear 4 by means of a crown 18 with fine teeth and with the intermediate clutch 17 by means of a crown 19 with large teeth mr, and the tooth of the crowns 18 and 19 have a triangular profile. Between the double-sided clutch 16 and the drive gear 4 a compression spring 20 is installed. On the side opposite to the crown; with large teeth on the intermediate sleeve 17, teeth 21 of a rectangular profile are made, between which and the shank 22 of the screw 7 are placed rolling elements 23, for example, balls fixed axially by a groove 24 formed on the shaft 1 and in the radial bore of the sleeve 25, fastened on the screw 7 with screws 26 (FIG. 4) on the drive gear 4 by means of screws 26 (FIG. 4), on the drive gear. 4. By means of the screw 27, a sleeve 28 is fixed, in the radial holes of which the balls 29 are located. To place these balls on the outer side surface of the intermediate sleeve 17, an annular canal 30 with an inclined edge is made. On the side of the coupling 16, on the inner surface of the sleeve 25 there are two annular grooves 31 and 32. Between the sleeve 25 and the drive gear 4, as well as the I worm 7 and the flange 12, there are corresponding compression springs 33 and 34 with the same characteristics, each From which approximately 2-3 times more spring force 2p.

The device works as follows. ..

When nyvebeganiya caliper g.est-; The crown stop the worm gear 8 stops and the gear 4 continues to rotate while rotating through the double-sided clutch 16 and the intermediate clutch 17, the worm 7. (Fig. 1) .. As a result, the worm to 7 is screwed into the tooth Hearts -

The wheels 8, depending on the direction of rotation 1 of the drive gear 4, move to the left (Fig. 6) or to the right (Fig. 7) along the shaft 1.

In the initial stage of this movement, the balls 13 under the influence of one of the side surfaces of the V-shaped groove 14 emerge on the outer cylindrical surface of the left shank of the screw 7, while compressing the spring 9 through the cup 11. The movement of the screw 7 continues until one from annular grooves 31 (fig. 7) or 32 (fig. 6) sleeve 25 is not comparable with balls 29, which, under the action of centrifugal forces and radial, make up 1Day caused by the inclined face of groove 30 of intermediate coupling 17 moved by by action The axial force generated by the interaction of the cams of the rims 19 with the large teeth of the double-sided clutch 16 and the intermediate clutch 17. The balls 29, falling into one of the grooves 31 or 32, release the intermediate clutch 17, which moves under the action of the specified axial force vlevr, completely disengages from the two-way coupling 16, after which the latter is under the action of a spring. 20 also moves to the left, resulting in disengagement of the rims 18 with fine teeth, thus ensuring a guaranteed kinematic chain breakage between the drive gear 4 and the screw 7, i.e. remaining; new support in a predetermined position, regardless of its direction move ..

To turn on the device, it is necessary to break the kinematic chain between the worm gear 8 and the translational mechanism: support movements. As a result of this, a worm to 7, moving; under the action of a spring (in Fig. 6 to the right) or a spring 35 (in Fig. 7 to the left) through one of the annular grooves 32 or 31 of the sleeve 25 acts on the balls 29, which, moving radially, press the inclined face of the groove 30. The axial component that arises during this moves the intermediate coupling half 17, and together with it the two side coupling 16 to the right until the latter finally engages with the Crown 18 with fine teeth of the drive gear 4. At the same time, the balls 13 get into the groove 14, and the force of the spring 9 through nahshmnoy The inner cone of the cup 11 is transmitted to the screw to 7, ensuring the transmission of the required torque.

Claims (1)

Invention Formula A device for an automatic key switch, containing a worm mounted to one axle on a single shaft, a two-sided socket with an end tooth, a drive gear and an elastic preload screw, which is different with the purpose (to increase reliability and simplify the design, It is equipped with an intermediate coupling that connects the worm to the double-sided coupling and a locking mechanism, with the outer coupling having an outer annular groove with an inclined edge; the locking mechanism is made in the form of The hub of the driving gear of the liner with radial holes in which the balls are located are in contact with the inclined edge of the said groove and the sleeve with two inner ring canoes, and the screw mechanism of the worm is made as mounted on the shaft with the possibility of mounting movements of the flange with radial holes balls in which there are balls interacting with inclined faces of an annular groove made on the screw and mounted glass concentrically with this flange with an internal cone . Sources of information taken into account in the examination 1, USSR Author's Certificate No. 325823, class B 23 Q 21/00, - 1370,  2-1.1, a 2