SU434204A1 - ROLLER PROTECTION COUPLING - Google Patents

Description

one

The invention relates to the field of engineering.

Various designs of safety couplings are known.

Ball safety couplings are widely used in machine tools. From the point of view of the interaction of forces and accuracy of operation, they are in more favorable conditions than the cam ones. The peculiarity of their work is that at the same overload moment as the balls exit from engagement the repulsive force compressing the spring increases and, if the spring resistance increases more slowly than this force, the clutch will act instantly.

However, in such couplings, significant contact voltages that occur when triggered, lead to rapid destruction of the balls. The use of rollers instead of balls allows to reduce the contact voltage when the clutch operates and, consequently, to increase its efficiency and the amount of transmitted torque.

Spring-roller couplings are known and consist, for example, of two coupling halves located one inside the other, with articulated spring-loaded levers with two rollers attached to (inside) in the recesses

the outer half coupling, which is coupled 1e of these couplings. A clutch of this design can only be used to transfer small torques in the iribors due to the fact that the pressure of the rollers is not small, and an increase in its width of such a clutch design will lead to an excessive increase in its dimensions. On the other hand, the clutch has an unbalanced mass relative to the axis of the vrash, and when it is frequently actuated, the outer half coupling will wear out, which, after dyeing the edges of the grooves, has to be completely replaced.

In order to increase the load capacity in the proposed coupling, the means for pressing the coupling rollers are made in the form of two conical washers and springs, movably in axial direction worn on adjustable but long rods located inside the coupling, and the coupling rollers of the movement are mounted in radial windows that are in the inner half coupling and made with tapered ends interacting with tapered and upper surfaces of washers, with the outer coupling fitted with additional rollers mounted in the semi-cylindrical recess in it and cooperating with the traction rollers. Such a coupling design makes it compact and ensures the transmission of sick torque. FIG. 1 demonstration of the proposed coupling in longitudinal section; in fig. 2 shows a section A-A in FIG. one; in fig. 3 is a section along BB in FIG. one; pas figs. 4 shows a section through FIG. 4 bb in fig. 2; in fig. 5 is a view along arrow G in FIG. 2. The coupling consists of the inner composite half coupling 1 and the outer coupling half 2, which has recesses 3 on the inner side, in which additional rollers 4 are embedded, and a textolite ring 5 is installed in the groove. The inner half coupling consists of a prus 6 and a separator 7 having a radial .-e windows 8, in which are inserted movable rollers 9, the tapered ends of which are made with tapered surfaces; and pins 10, pressed by the gangs 11, paneti on the length-adjustable rods 12. The half coupling 1 is rigidly connected to the shaft, the sweat uf 2 is freely seated on the hub of the coupling 1 and is fixed from axial displacement by the spring lock ring 13. The torque from the coupling half 1 is transmitted to coupling half 2 through coupling rollers 9 and additional rollers 4. When the torque to which the clutch is tuned is reached, using adjusting springs 11, rollers 9 are displaced in radial direction in window 8 and disengaged from rollers 4, cone The ends of the joint push the spring washers Yu. After the rollers 9 have left the rollers 4, the washers 10 move the rollers 9 in the window 8 to their previous position and the rollers begin to slip one over the other, thereby preventing overloading of the mechanism. The subject of the invention is a safety clutch containing inner and outer coupling halves interacting with each other using coupling rollers and means of pressing them, characterized in that, in order to increase the load capacity, the means of pressing rollers of coupling rollers are made in the form of two conical washers and springs, mounted movably in the axial direction on the length-adjustable rods located inside the coupling, and the coupling rollers are mounted movably in radial windows that have in the inner coupling half, and made with a cone With the two ends interacting with the conical surfaces of the washers, the outer half coupling is equipped with additional rollers installed in the semi-cylindrical recesses in it and interacting with the coupling rollers.

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