SU386174A1 - SAFETY CLUTCH - Google Patents

Description

one

This invention relates to the field of general engineering.

Safety couplings are known that contain two half-couplings, in the openings of one of which are spherical inserts filled with small diameter balls covering the surface of large balls interacting with curvilinear grooves provided at the end of the second half coupling.

The proposed design is characterized in that the coupling half with curved grooves at the end is mounted on the shaft with the possibility of axial adjustment and is made in the form of a cup spring. This makes it possible to reduce friction losses and improve the accuracy of operation. The clutch can be used to protect masin and mechanisms from torque overload.

FIG. 1 is a longitudinal section of the coupling; in fig. 2 - profile of the curved end surface and the installation scheme of balls.

The coupling contains two coupling halves / and 2. In the axial holes of the coupling half / there are spherical inserts 3, filled with balls 4, covering balls 5. The coupling half 2 on the end surface has curvilinear notches 5 with which the balls are in constant contact 5. made in the form of a plate

springs, which, during the operation of the coupling, allow for the axial movement of the spherical inserts and the sliding friction in the holes. When the coupling is triggered, the balls 5 roll over the curved surface of the half-coupling 2, and the balls 4 roll them along the spherical surface of the inserts 3 without sliding.

To change the moment of operation of the coupling, coupling half 2 is mounted on the shaft 7 with the possibility of axial adjustment with nuts 8. In addition, coupling half 2 is interchangeable, which allows the elastic characteristic of the coupling to be changed.

Subject invention

A safety coupling containing two half-couplings, in the holes one of which contains spherical inserts with circular bands filled with small-diameter balls that are in contact with the surface of large balls interacting with curvilinear notches located at the end of the second half-coupling, characterized by in order to reduce friction losses, the half-coupling with curved grooves is mounted on the shaft with the possibility of axial adjustment and is made in the form of a coil spring, deformed when overloaded.

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