SU712559A1 - Safety coupling - Google Patents

Description

The invention relates to the field of general engineering and may find application in safety devices.

A safety friction clutch is known comprising a driving and driven 5 coupling halves connected by a friction lining of soft magnetic material having a wavy end surface (1].

However, it is difficult in said clutch 10 to regulate the transmitted torque, which is carried out by selecting a friction lining of a certain thickness.

A safety clutch is also known, comprising two half-couplings mounted on shafts, leading with magnets on the end surface and driven, axially movable and having magnetic liners at the end {2]. 20

This coupling is the closest to the invention in technical essence and the achieved effect.

However, this clutch can only work if the connected shafts are aligned and cannot be used when transmitting motion between non-coaxial, angled or radially movable shafts.

In order to expand operational capabilities and ensure ease of use, the proposed coupling is equipped with ferromagnetic liners mounted on the end of the driven coupling half, while the latter and magnets are mounted with the possibility of axial movement with subsequent fixation in a predetermined position, and the coupling halves are mounted on cantilevers.

In FIG. 1 shows the proposed coupling in longitudinal section; in FIG. 2 · —section A — A in FIG. 1.

The coupling contains a shaft 1 with a driven flange coupling half 2 mounted on it with threaded ferromagnetic bushings

3. A drive coupling half 5 is mounted on the shaft 4, equipped with the number of inserts 3 on the driven coupling half 2 with permanent magnets 6, fixed in sockets 7 of the coupling half 5 with bolts 8. The shafts 1 and 4 may be aligned, or one of them may be slightly shifted radially direction or located at some angle to another. The shafts can be fixed or movable relative to each other. One or both coupling halves are mounted on the respective shafts with the possibility of axial displacement.

When rotating the drive shaft 4 at its fortified coupling half 5 has constant magnp712559 you 6 interacting with ferromagnetic inserts 3 for coupling half 2 of the shaft 1, leading it into rotary motion synchronously shaft 4. By increasing the load on the driven shaft ⁵ provided one above the level magnetic interaction forces are insufficient to overcome the arisen resistance and the leading coupling half 5 idle rotates relative to the driven coupling half 2, thereby preserving the device from overloads and breakdowns. To increase the transmitted force, it is necessary to reduce the gaps between the interacting permanent magnets 6 and the ferromagnetic liners 15 by adjusting the position of the latter on the coupling half 2 or, accordingly, changing the position of the coupling halves 2 and 5 on the shafts 1 and 4, bringing them closer to the required value. 20

To reduce the transmitted force, reverse steps must be taken.

The proposed safety clutch, the operation of which is based on the interaction of permanent magnets mounted 25 on one coupling half, with ferromagnetic

4.

liners of another coupling half, can be successfully used in a variety of conditions, when the alignment of the shafts is broken or the shafts are mutually movable.

Claims (1)

Claim A safety clutch containing two half-couplings mounted on the shafts, leading with magnets on the end surface and driven, axially movable, characterized in that, in order to expand operational capabilities and ensure ease of use, it is equipped with ferromagnetic liners mounted on the end of the driven half-coupling, with this last and the magnets are mounted with the possibility of axial movement with subsequent fixation in a given position, and the coupling halves are placed on the shafts console.