RU1800166C - Protective friction clutch - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to devices for transmitting torque of a limited size. The aim of the invention is to increase the accuracy of operation. The coaxial coupling halves 1 and 2 are connected by a friction disk 3. The main pressure disk 4 and the additional pressure disk 11 are mounted concentrically and connected by a key 10. The disk 4 is spring-loaded to the friction disk by spring 7, the disk 11 is spring-loaded to the friction disk by spring 12, between the disks 5 and 4, balls 6 are placed in sockets of variable depth made on them. When transmitting torque to the disk 4, a spacer force acts on the side of the balls 6, which reduces the force of pressing it. As the drag moment on the driven coupling half increases, the disk 4 is squeezed from the friction disk 3 by an increasing spacer force, which reduces the friction moment in the friction pairs and improves the clutch response accuracy. 1 s.p. f-ly, 2 ill.

Description

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The invention relates to mechanical engineering, in particular to devices for transmitting a limited amount of torque.

In FIG. 1 shows a safety clutch; in FIG. 2 is a section AA in FIG. 1,

The safety friction clutch comprises coaxial half-couplings 1 and 2 connected by a friction disc 3 mating to the half-coupling 1 2 by means of a spline joint. The main pressure disk 4 is mounted freely relative to the coupling half 1. Between the thrust disk 5, rigidly mounted on the coupling half 1, and the main pressure disk 4, balls 6 are placed in the variable depth sockets made on them. The force circuit is provided by a compression spring 7, the force of which is regulated by nuts 8. The force of the spring 7 to the disk 4 is transmitted through the thrust bearing 9.-On the main pressure disk 4 is installed by means of a guide key 10 additional pressure disk 11, with the possibility of axial movement along the disk 4. D the suit 11 is mounted concentrically to the disk 4, and the average radius of the disk 4 exceeds the average radius of the disk 11. Between the pressure plates 4 and 11, an additional compression spring 12 is installed, the force of which is regulated by screws 13 that transmit the axial force to the spring through the support washer 14. Spring force 7 exceeds the force of the spring 12.

The proposed clutch operates as follows.

When transmitting torque, the freely installed main pressure disk 4 together with the additional pressure disk 11 rotates relative to the stop disk 5 under the action of the resistance moment from the friction disk 3. As a result, the balls 6 come into contact with the stop and main pressure plates, as a result of which a spacer force arises on the balls, directed against the force of the spring 7. The described process occurs when the rated torque is transmitted. With increasing moment of resistance on the driven coupling half 2, for example, due to

increase the friction coefficient between the friction pairs, the spacer force also grows on the balls 6, decreasing the pressing force of the main pressure disk 4. At the same time, the moment comes when the spacer force is equalized with the force of the spring 7 and spring 12, the pressure disk 4 does not transmit any load . This is made possible due to the fact that the spacer force

is stored and maintained as a result of the torque transmitted by the additional pressure plate 11. During this time period, the torque is transmitted by the thrust and additional pressure plates. Due to the decrease in the pressing force of the friction pairs, and also due to the fact that the additional pressure plate 11 has an average radius that is less than the average radius of the main

Claims (2)

1. Safety frictional a clutch comprising two half-couplings, one of which is connected by means of a spline connection to the friction disk, and the other is made with a thrust and freely mounted relative to it pressure plates, located on both sides of the friction disk and spring-loaded with a compression spring thereto, a unit for adjusting the torque and rolling element located in the nests of variable depth arranged on the thrust and pressure discs, characterized in that, in order to increase the accuracy of operation, it is provided with olnitelnym push a disk spring-loaded to the friction disk relative to the main pressure plate of the additional spring compression and mounted concentrically to the main pressure disk with the possibility of axial displacement relative to the latter, the average radius of the main pressure plate being greater than the average radius of the additional pressure disk. 2. A clutch according to claim 1, characterized in that the additional compression spring is provided with means for adjusting its force.