SU1760207A1 - Safety clutch - Google Patents

Abstract

Used in mechanical engineering, in disk feeders for carrying the V liver to reverse the rotation of the disk at the moment of overload. The essence of the invention: the coupling consists of a leading coupling half with fixed stops 2 of cylindrical shape. In the driven floor coupling installed arcuate-shaped levers 6 Each lever 6 is spring-loaded to stops 2 and contacts the inner concave surface with one stop, and the end with the other, adjacent stop. 4 yl

Description

The invention relates to mechanical engineering, in particular to safety devices designed to limit the magnitude of the torque transmitted by the drive by disconnecting the drive during overloads.

A safety device in the form of a friction clutch is known, which contains the driving and driven half couplings, between which the driving and driven friction disks, the pressure plate, the calibrated spring and the nut for pressing it (1) are located on the splined joints.

The disadvantage of this clutch is the presence of torque on the driven shaft and the absence of its reversal during actuation.

Also known is a safety coupling containing a driven flange half coupling with fingers mounted in the flange, driving the coupling half in the form of a central gear, coupled to the driven coupling half by means of gear elements, each of which is rigidly connected to the end of the finger facing the central gear, the limiter of its axial movement, as well as rolling bodies, located in the recesses made at the end of each gear element eccentric to its axis, and pressed by an elastic link The flange of the driven half coupling at the same time each gear element is made with one tooth, the elastic link is made in the form of cylindrical compression springs mounted on the fingers between the limiter and the flange of the driven coupling half, and at the end of the flange facing the gear elements, an annular groove of the paddle rolling (2).

The disadvantage of this clutch is the lack of reversal during the actuation process.

The purpose of the invention is the expansion of technological capabilities by ensuring the reversal of the rotation of the driven half-coupling.

The goal is achieved by the fact that in a safety clutch containing two coaxially located coupling halves,

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one of which has stops, and the other has fingers attached to which the connecting levers located in contact with the stops are mounted, the stops are cylindrical, the connecting levers are arcuate, connected to the fingers by torsion springs and each lever is located in contact concave surface with one stop, and the end - with another, adjacent to it, the stop.

FIG. 1 shows a safety coupling integrated in a disk conveyor of the control and sorting machine; in fig. 2 is a section A-A in FIG. one; in fig. 3 - moment of jamming the part; in fig. 4 - safety clutch elements in the position of actuation (reverse) after the moment of seizure.

The safety clutch contains a leading coupling half 1, on the free end of which the cylindrical supports 2 are installed evenly around the circumference, the driven coupling half 3 is concentrically mounted, and on the end 4 of the connecting arms of the arcuate shaped 6 with torsion springs 7 are installed with the possibility of turning. The number of connecting arms of arcuate shape 6 is equal to the number of stops of cylindrical shape 2, and in the initial position due to the force of torsion springs 7 each connector the first arc-shaped lever 6 is in contact with the two abutments cylindrical shape 2 - 8 and a concave end surface. At the same end of the driven coupling half 3, a disk conveyor 10 with slots 11 is installed, where the measuring parts 13 are fed from the feeding tube 12. In order to reduce the response time (to eliminate reverse jamming), a spring-loaded clamp 14 is installed, which ensures coaxial fixation of the groove 11 of the disk conveyor 10 relative to the feeding tube 12.

Safety clutch works as follows.

The driving coupling half 1 rotates against the stops of cylindrical form 2 against the ends of the arcuate connecting arms 6, which pass the torque through the fingers 5 to the driven coupling 3, while the latch 14 does not counteract the rotation of the disk conveyor 10 in the direction of the working stroke.

At the moment of the wedging of the part 13 (Fig. 3), the leading coupling half 1, rotating, overcoming the force of the torsion springs 7 by the stops of the cylindrical form 2, opens the arcuate connecting levers 6. At the moment when the connecting levers of the arcuate 6 with a concave surface 9 begin to enclose the cylindrical stops form 2 (Fig. 4), due to the force of the torsion springs 7, the connecting arms of the arcuate form 6 are tightened until they touch the ends of the eight stops of the cylindrical form 2. At the same time, the disk conveyor 10 rotates abruptly back the part 13 is clamped by the retainer 14 in the coaxial position of the groove 11 and the feeding tube 12. The part 13 is pushed into the groove 11, and the disk conveyor 10 is held by the retainer 14 until the ends 8 of the connecting arms of the arcuate shape b touch the cylindrical shaped lugs 2, then begins rotation in the direction of the working stroke,

In the proposed safety clutch, reverse (reverse) is

an angle of 60 °, which is quite enough for wedging and getting the part into the groove at low revs (8-10 rpm) of a disk conveyor.

Reversing the driven half coupling in

the overload moment allows the automatic exit from the jamming position, which improves the performance of the control and sorting machine, both at the expense of setup time and at the expense of time just until the operator fixes the problem. The expected economic effect from the use of a safety clutch in the control and sorting machine 1000 rub. in year.

Claims (1)

Claims of the Invention A safety clutch comprising two coaxially disposed coupling halves, one of which has stops, and on the other there are fingers, on which connecting levers are pivotally mounted, which are located in contact with the stops, wherein in order to expand technological capabilities by ensuring reversal of rotation of the driven coupling half, the stops are cylindrical, the fingers are rigidly fixed on the coupling half, the connecting the arms are arcuate forms, are connected to the fingers by means of torsion springs and each lever is in contact with a concave surface with one stop, and the end with the other, adjacent stop. 1 four A-A J § . iJicU 5.Ј / 3 # t-i-j / P. r, L r-f- y-flil .- .. JLSp / 0