SU734455A1 - Friction multidisc clutch - Google Patents

Description

I

The invention relates to the field of engineering and can be used to connect the shafts of machines and mechanisms, which have increased requirements for the dynamics of the separation of shafts, such as metal cutting machines, of their machines.

Known designs of friction multi-plate clutches 1.

Such couplings provide quick relaxation of the disk pack and the fall of the coupling moment when it is disconnected.

A multi-disc friction clutch is known, having outer discs made of separate segments which, alternating with inner discs, are strung on the fingers or protrusions of the leash 2. Centrifugal forces arising in the segments during its rotation are used to accelerate the clutch. For this purpose, the fingers or protrusions of the driver have a surface inclined to the axis of the coupling, with the angle of inclination directed towards the movement of the discs when the coupling is disconnected. When the coupling is disconnected, the outer disk segments under the action of centrifugal forces move simultaneously in the radial and axial directions, which contributes to

the relaxation of the entire disk pack and, accordingly, the acceleration of the decay of the coupling moment.

However, this design does not allow to reduce the time of decay of the moment at 5 low rotational frequencies. In addition, the angle of inclination of the surface of the protrusions of the driver must be large enough to use the axial component of the centrifugal force of the segment, which is small, and this leads to a deterioration of 10 conditions for engaging the clutch as the resistance of the compressed disc package increases. In addition, the residual torque of the disconnected clutch significantly increases, since the discs, due to the constantly acting axial matching centrifugal force, accumulate at the pressure element and are pressed against it.

Claims (3)

Closest to the invention is a clutch containing a sleeve with internal discs mounted on it and a leash with external discs mounted on its protrusions having bevels on the side surfaces directed towards the disconnection of the clutch 3. The disadvantages of this clutch are also large the time of decay of the moment when disconnected, a large amount of residual rotation, its moment and the presence of resistance to the inclusion of the coupling. The aim of the invention is to reduce the time of decay of the moment when the magnitude of the residual angular momentum is turned off and to improve the initial conditions for switching on. The goal is achieved by the fact that the bevels are made along the entire length of the protrusions, and the leash is provided with flat springs fixed cantileverly arranged along the side surfaces of the protrusions and have rigidity exceeding the circumferential force created by the residual vrash, ayush, and their coupling moment. FIG. 1 shows a multi-disc friction clutch, general view; in fig. 2 - outer disk, partial view. The multi-disc clutch has a sleeve 1 with internal disks 2 mounted on it and a leash 3 with spring disks 5 installed in its tapering protrusions 5. Cantilever springs 6 are installed on the side surfaces of the protrusions. touched the bushings, they are centered on the bore diameter D. As the discs rotate relative to the driver when moving along the protrusions, in order to achieve their contact with the protrusions within the middle of the depth of their grooves NOSTA grooves disc has rounded edges. Making the protrusions wedge-shaped when the clutch transfers torque to the load creates conditions for the occurrence of axial components of circumferential force acting on each individual disc. This contributes to the speedy movement and relaxation of the package to axial movement and relaxation of the disk pack when the clutch is disconnected. The lateral surfaces of the flat cantilever springs 6 in the disconnected state of the coupling are parallel to its axis, and when switched on, they are pressed against the lateral surfaces of the protrusions of the driver due to circumferential force from the moment of loading. The stiffness of the springs 6 is chosen so that it is greater than the circumference of the force from the residual torque moment, therefore when the clutch is disconnected, the disks 5 under the action of the springs 6 are evenly distributed along the projections 4 of the driver, thus eliminating the residual torque. When the clutch is turned on, its moment increases only after the attraction of the core, i.e. after the end of the compression of the discs, so the discs move along the springs until they deform without experiencing additional resistance, which ensures stable initial conditions for engaging the clutch. Claims of the Invention A multi-disc friction clutch comprising a sleeve with internal disks mounted on it and a leash with external disks mounted on its protrusions having bevels on the side surfaces directed towards the movement of the disks when the clutch is disconnected, which is the time of decay of the moment when disconnected, the magnitude of the residual torque and the improvement of the initial conditions of inclusion, the bevels are made along the entire length of the protrusions, and the leash is equipped with flat springs, fixed and a cantilever disposed along the side surfaces of the projections and having a stiffness greater than the circumferential force generated by the residual coupling torque moment. Sources of information taken into account in the examination 1.O.N.O.N. Designs of controlled couplings abroad, M., CINTIM, 1963. 2. The patent of Germany No. 1208127, cl. 47 s. 11, 1966. 3. The patent of Germany No. 1073249, cl. 47 s. 15, 1950 (prototype).