SU941740A1 - Safety clutch - Google Patents

Description

(54) PROTECTION COUPLING MP P. SHISHKAREV

one

The invention relates to mechanical engineering and can be used in all parts of the national economy to connect the shafts of machinery and mechanisms under conditions of transmission of a limited torque.

Known safety clutch, containing, and the leading and driven coupling half interacting by means of spring-loaded crackers, installed in one of the coupling half and the input into the grooves made on the other half coupling 1.

The disadvantage of this clutch is its considerable radial dimensions and the need to have spring mechanisms to press the crackers, lack of reliability of operation.

The purpose of the invention is to increase reliability.

To achieve this goal, the clutch is equipped with a ring of non-magnetic material mounted on the half coupling half so that rotation is limited relative to it, the half coupling is made of magnetic material with non-magnetic overlays on their ends, and the crackers are made

in the form of permanent magnets mounted in a ring.

FIG. 1 shows the coupling, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

5 The safety coupling contains a leading coupling half 1 and a driven coupling half 2, made of magnetic material. On the hub of coupling half 1, a ring 3 of non-magnetic material is fixed axially with a stopper 4. The ring has protrusions entering the grooves 5 of half coupling 1 (Fig. 3) and carries crackers 6 in the form of permanent magnets mounted in through axial holes x rings and wedge ends in grooves 7 on

Claims (2)

5 half coupling 2. To fix the rotation of the crackers, pins 8 serve around their axis. On the end of coupling half 1, lining 9 of non-magnetic material is fitted flush, fixed with screws of non-magnetic material in such a way that they overlap the areas of contact of the face of cracker with coupling half 1 after turning ring 3 within groove 5 of the coupling half 1. In FIG. 3 shows the installation of the lining 9 and crackers 6. The safety clutch works as follows. When rotating half coupling 1 in the direction shown by the arrow in FIG. 3, the torque through the ring 3 and the crackers 6 held by the magnetic forces in the wedge grooves 7 is transmitted to the coupling half 2. When overloaded, the crackers move to the left and, coming out of the wedge groove of the coupling half 2, rotate with the ring 3 and the coupling half 1 relative to the coupling half 2. The wedge end of the cracker (Fig. 2) gets into the portion of the end of coupling half 2, covered with non-magnetic pads 10. As a result, the crackers are attracted to the end of coupling half 1, move to the left and cease to contact with coupling half 2, thereby ensuring the free rotation of coupling half with the ring 3 relative to the coupling half 2 without friction. To engage the coupling, coupling half 2 is fitted with wedge grooves against the crackers and turn ring 3 clockwise. In this case, the ends of the crackers, slid along the end of the half coupling 1, fall onto the non-magnetic cover 9 and, having ceased to be attracted to the coupling half 1, under the action of magnetic forces move to the right, attracting to the coupling half 2, and enter into the wedge grooves. At the beginning of rotation, the ring 3 occupies the initial position relative to the coupling half 1. To ensure the operability of the coupling when reversed, the width of the groove A on the coupling half 1 must be such as to ensure that the end of the cracker is installed in the working position against the magnetic section of the coupling half 1 on the other side of the gasket 6. efficiency is achieved by increasing the service life of the coupling, simplifying the design (lack of spring-loading mechanisms and fixation of crackers) and ease of operation of the coupling. Claims of the invention Safety clutch containing the drive and driven coupling halves, interacting through crackers placed between the coupling halves and entering the grooves made on the driven coupling half, characterized in that, in order to increase reliability, it is equipped with a ring of non-magnetic material mounted on the drive coupling. the coupling half with the possibility of limited rotation relative to it, the coupling half made of magnetic material with non-magnetic overlays on their ends, and the crumbs are made in the form of permanent magnets, set in the ring. Sources of information taken into account during the examination 1. Ivanov E. A. Couplings of drives. M., Mashchgiz, 1954, p. 330, fig. 254 (prototype). -e b2b FIG.