SU1249220A1 - Safety coupling - Google Patents

Description

The invention relates to rolling production, in particular, to the main and auxiliary equipment of rolling mills, and is intended to transmit and limit the torque in drive lines.

The aim of the invention is to increase the reliability and accuracy of the operation of the coupling by eliminating the influence of distortions of the shafts connected by this coupling on the operation of the safety discontinuous elements.

FIG. 1 shows a safety clutch; in fig. 2 is a section A-A in FIG. one; in fig. 3 - safety clutch after actuation; in fig. 4 is a section BB in FIG. 3; in fig. 5 is a section DD in FIG. 2

The safety coupling consists of the heads and the driven coupling halves 1 and 2, respectively, with mechanical helical cams. The coupling halves 1 and 2 are connected by safety discontinuous elements 3, installed diametrically opposite to the tangential grooves made in the coupling halves.

The centering ring 4 is rigidly fixed to the inner diameter of the leading coupling half 1, for example pressed, and the inside diameter of the driven coupling half 2 enters freely, ensuring the alignment of the half coupling and additional rigidity of the structure.

Driven coupling half 2 is made in the form of concentrically mounted bushings 5 and casing 6. Pa of the outer surface of the bushing are longitudinal grooves 7, in which balls 8 are mounted and two discs 9 are fixed. Longitudinal grooves 10 are also made on the inner surface of casing 6, along which balls 8 move when the clutch is activated, therefore the length of these slots should ensure the complete opening of the cams of the coupling halves. The cavity formed by the longitudinal grooves 7 and 10 is filled with grease and sealed with sealing caps 11 and 12.

The safety discontinuous elements 3 are secured in the slots by means of set screws 13.

On the helical cams of the coupling half, additional mating lugs 14 on the coupling half 2 and cavities are made

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five

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15 on the half coupling 1, located on the sides of the cams.

Safety clutch works as follows.

This clutch transmits the limiting torque at one direction of rotation. In the working condition of the coupling, the cams of the coupling half are engaged, the protrusions 14 of the mate with the depressions 15, the sleeve 6 are slid on a sliding fit onto the centering ring 4, which is welded or pressed into the coupling half 1. This provides a rigid connection of the half coupling 1 and the holder 6, and the transfer of the sleeve 5 relative to the coupling half 1 is compensated for by the balls 8.

The torque is transmitted from the coupling half 1 through the discontinuous safety elements 3 to the holder 6, then to the balls 8 to the sleeve 5.

When the drive is overloaded, when the torque becomes higher than the limit, the rupture elements 3 are destroyed, the coupling half 2 stops, and the coupling half 1, continuing rotation from the engine, screw cams displaces axially relative to the fixed sleeve 5 the axle 6 along with the sealing caps 11 and 12 to cams out of engagement. The halves of the ruptured rupture elements are held in grooves by screws 13.

To bring the safety clutch to its working initial position, it is necessary to remove the halves of the safety elements 3, engage the coupling halves 1 and 2 into engagement until the screw cams and their projections 14 with the hollows 15 are fully closed, insert the new discontinuous elements 3 and fix them with set screws 13. work.

Thus, the additional mating with each other protrusions and depressions on the cams, made screw, in combination with the centering ring, ensuring the alignment of the coupling halves, create a rigid connection of the latter. The angular distortions of the connected shafts are compensated by balls placed in the grooves of the sleeve and the sleeve.

As a result, the rupture elements during the operation of the coupling are subjected only to stretching, ensuring reliability and high accuracy of operation.

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FIG. 2

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Claims (1)

SAFETY COUPLING, containing the leading and driven half-couplings, connected by end cams and diametrically located in to accommodate the balls. SU, 1249220 of the tangential grooves of the coupling halves of the safety explosive elements, characterized in that, in order to increase the reliability and accuracy of operation, it is equipped with a centering ring fixed along the inner diameter of the drive coupling half and freely entering the driven coupling half, the end cams are made of screw with additional mating to each other protrusions and depressions on the sides of the end cams, and the driven coupling half is made in the form of concentrically mounted bushings and cages, as well as balls, while on the reverse nnyh to one another surfaces of the sleeve and ferrule made a cut-forming the cylindrical grooves