SU473029A1 - Safety ball coupling - Google Patents

Description

one

The invention relates to the field of general engineering and instrumentation and can be used to transfer small torques to kinematic instruments.

A known coupling comprising coaxially mounted flange half couplings connected by balls placed in holes on their end surfaces. The coupling halves are pressed against one another by means of an annular permanent magnet and an adjustable stop. The operation of the coupling is accompanied by the axial movement of one of the coupling halves and the release of its peripheral springs. Moreover, the half coupling moves along the shaft splines with a slip, which reduces the stability of its operation, especially when transmitting small torques.

In order to provide ease of assembly, an annular permanent magnet interacting with one end body with rolling elements, and the other with an adjustable stop, is mounted freely on the hub of one of the coupling halves with the possibility of axial movement, the thickness of the flanges of the coupling halves being smaller the ends of the coupling half through.

The drawing shows the proposed coupling, a longitudinal section.

The half coupling 1 is connected with the pinion gear 2, which is freely seated on the shaft 3, and is provided with balls 4 placed in its openings. Half coupling 5, in which through holes

Balls 4 are also placed, seated on the shaft on the plug, and interacting with an adjustable stop in the form of a nut 6 with a lock nut 7, which is necessary for adjustment to a predetermined torque. An annular permanent magnet 8 is freely mounted on the hub of the half coupling 5, interacting with it by a magnetic field and keeping the balls from falling out. An annular permanent magnet plays the role of a power element providing

the interaction of both coupling ends through the balls, and at the same time serves as a raceway.

The torque from gear 2 through coupling half 1 and balls 4 is transmitted to coupling half 5. At the moment of overload, the force increasing on the balls 4 mixes the balls in the holes of coupling half 5 and moves the annular permanent magnet 8 away from it, overcoming the force of its magnetic field. At the same time

by the action of the angling moment, the balls of the half-coupling 5 roll over the balls of the half-coupling 1 and insert a loosely mounted ring magnet on the hub of the half-coupling 5 in the direction opposite to the direction

rotation of the coupling half 1. When the balls are disengaged, the torque is not transmitted by the clutch.

The main advantages of the proposed ball safety clutch, but compared with the known ones, are increased operation stability when transmitting small torques, reduction of dimensions in axial direction and simplified assembly.

Subject invention

Safety ball coupling containing coaxially mounted flange

coupling halves connected by balls placed in the holes on their face and surfaces, and an annular permanent magnet with adjustable norm, which

that, in order to increase the stability of operation and provide ease of operation, an annular permanent magnet that interacts with one end of the rolling bodies, and the other with an adjustable stop, is mounted freely on the hub of one of the coupling halves with the possibility of axial movement, and the diameter of the balls, and the holes for them are made at the ends of the coupling half through.