SU1339328A1 - Slipping clutch - Google Patents

Abstract

The invention relates to the field of engineering, in particular to devices for transmitting rotation. The aim of the invention is to improve the accuracy of operation and reduce wear by reducing the level of dynamic loads during operation. The clutch is equipped with a sleeve 8, installed by means of a key 7 on the main coupling half 1. The pressure 6 and thrust 4 discs are installed freely. The rolling bodies 12 are placed in the slots of the discs 4, 6 and the hub 8. With an increase in the moment of the rolling body 12, the circumferential force is transmitted only by the disk 6, compressing the spring 13 through the hub 8. Then the rolling body 12 transfers the circumferential force and the coupling moment decreases. 3 il. (L with with with with 00

Description

one

The invention relates to a machine builder, namely, rotation transmitting devices.

The purpose of the invention is to improve the accuracy of operation and reduce the wear of the coupling by reducing the level of dynamic loads when it is triggered.

FIG. 1 shows a safety clutch, longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The safety friction clutch contains coaxial drive 1 and driven 2 coupling halves, friction disk 3. The thrust disk 4 is mounted on the coupling half 1 freely and rests on the flange of the coupling half 1 through rolling bodies 5 (separator not shown). The pressure disc 6 is mounted loosely on the hub of the stop disc 4. On the half coupling 1, a sleeve 8 is installed by means of the guide key 7. The stop 4 and pressure 6 disks have slots 9 and 10 of variable depth (Fig. 2), and the sleeve 8 has slots 11, expanded to the axis of rotation of the coupling. In nests 9-I there are rolling bodies (balls 12). The bevel angle of the socket 10 of the pressure disc 6 exceeds the bevel angle of the socket 9 of the stop disc 4. The sockets 9 and 10 are aligned axially. The force of the closure is carried out by the pressure spring 13, the adjustment of which is effected by the nuts 14.

The safety friction clutch operates as follows.

The force of the spring 13 is transmitted through the sleeve 8 and the balls 12 to the pressure disk 6 due to the fact that the centers of the balls 12 are offset relative to the seating surface of the support 4 and pressure 6 disks from the latter (Fig. 1) and in the axial direction the balls 12 are in contact only with the disk 6. The latter transmits the force of the spring 13 to the thrust disk 4 through the friction disks 3 ..

The moment is transmitted from the leading coupling half 1 to the driven coupling half 2 through the exhaust 7, sleeve 8, interacting with the cavities of the hub of the ball 12, thrust 4 and the pressure 6 disk 3 connected to the half coupling 12 through their slots 9 and 10 and friction disks 3 associated with coupling half 2 by means of a shlitsevy connection. As a result of the moment transfer, radial forces arise on the balls 12 (from the interaction of the balls with bevels of the sockets 9 and 10 of the disks 4 and 6) directed from the axis of rotation of the coupling. The indicated forces of the balls 12 will affect

2

the beveled walls of the sockets 11 of the sleeve 8 create axial components acting on the sleeve 8 and the compressive spring 13. As the result of the sleeve 8 moving to the right of the ball 12, they move in the direction from the axis of rotation of the coupling and upon reaching the limit moment transferred out of the sockets 9 of the stop disc 4, thereby bringing out the last of the power transmission circuit of the moment. In this case, the magnitude of the moment

0 transmitted by the clutch is halved (with two friction surfaces). As a result, the magnitude of the tangential force on the balls 12 from the disk 6 side decreases. To avoid returning the ball 12 to its initial position, the bevel angle of the slots 10 of the disk 6 is larger than that of the 9 disks of the stop disc 4, which maintains the equilibrium state of the sleeve 8. As a result, wear of the friction surfaces is reduced, the durability of the coupling elements and the accuracy of its operation are increased. After the drive (not shown) is disconnected from the master half coupling 1, the torque transmitted by the pressure disk 6 and the centrifugal force of the balls 12 decrease, as a result of which the spring 13 returns the balls 12 to their original position through the sleeve 8, reset the clutch.

thirty

Claims (1)

Invention Formula Friction clutch, containing coaxially mounted drive and driven coupling halves, friction discs, a thrust disk rigidly connected to the drive coupling half, a freely mounted pressure plate, rolling bodies placed in variable depth slots, made in a thrust and pressure disks, a pressure spring and its adjustment unit, differ from each other in order to improve the accuracy of operation and reduce wear on the operation, it is provided with a sleeve installed between the compression spring and the rolling bodies with the possibility of axial movement, the thrust disk set freely, variable sockets the depths of the thrust and pressure disks are aligned in the direction along the axis of the coupling, the hubs have sockets extending to the axis of the clutch opposite the pressure and thrust disk sockets, and the rolling bodies are partially located in the hub sockets. Compiled by I. Lukin Editor N. BobkovTehred I. Veres Corrector V. Butt ha Order 4204/27 Circulation 811 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 1 13035, Moscow, F - 35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Design. four 9ig.5